Document and entity information. Document and Entity Information [Abstract] Statement [Table] Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Current Fiscal Year End Date Entity Filer Category Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Public Float Entity Common Stock, Shares Outstanding Consolidated Balance Sheets [Abstract] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash at end of year Cash at beginning of year Cash The total amount due to the entity within one year of the balance sheet date from outside sources, including trade accounts receivable and revenues recognized in excess of billings, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. Accounts Receivable and Unbilled Revenue Net Accounts receivable and unbilled revenue, net of allowance of $2,574 and $1,881 at December 30, 2016 and January 1, 2016, respectively Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Total Property and equipment, net Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. This balance also includes the sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Noncurrent assets are expected to be realized or consumed after one year. Other Assets and Intangibles Other assets Goodwill, Net Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Other Liabilities, Current Accrued expenses and other liabilities Liabilities, Current Total current liabilities Deferred Tax Liabilities, Net, Noncurrent Non-current deferred tax liability, net Long-term Debt Long-term debt Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Equity [Abstract] Shareholders' equity: Preferred Stock, Value, Issued Preferred stock, $.001 par value, 1,250,000 shares authorized, none issued and outstanding Common Stock, Value, Issued Common stock, $.001 par value, 125,000,000 shares authorized; 54,785,193 and 53,847,479 shares issued at December 30, 2016 and January 1, 2016, respectively Additional Paid in Capital Additional paid-in capital Treasury Stock Value Treasury stock, at cost, 26,197,981 and 24,138,694 shares at December 30, 2016 and January 1, 2016, respectively Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Stockholders' Equity Attributable to Parent Balance Balance Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts Accounts receivable and unbilled revenue, allowance Preferred stock, par value Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Common Stock, Par Value Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Treasury Stock, Shares Treasury shares Treasury stock, at cost, shares Consolidated Statements of Operations [Abstract] Revenues [Abstract] Revenue: Sales Revenue, Services, Net Revenue before reimbursements Reimbursement Revenue Reimbursements Revenue Total revenue Total revenue Costs and Expenses [Abstract] Costs and expenses: Cost of Services [Abstract] Cost of service: Cost of Services Personnel costs before reimbursable expenses (includes $5,758, $5,359 and $3,556 of stock compensation expense in 2016, 2015 and 2014, respectively) Cost of Reimbursable Expense Reimbursable expenses Cost of Revenue Total cost of service Selling, General and Administrative Expense Selling, general and administrative costs (includes $3,007, $5,002 and $2,814 of stock compensation expense in 2016, 2015 and 2014, respectively) Business Combination, Bargain Purchase, Gain Recognized, Amount Bargain purchase gain from acquisition Bargain purchase gain on acquisition Bargain purchase gain Restructuring Costs Restructuring costs Restructuring costs Costs and Expenses Total costs and operating expenses Income from operations Operating income Operating income Nonoperating Income (Expense) [Abstract] Other income (expense): Investment Income Interest Interest income Interest Expense Interest expense Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments Income from operations before income taxes Income from continuing operations Income Tax Expense Benefit Income tax expense Income tax expense Net Income (Loss) Attributable to Parent Net income Net income Net income Earnings Per Share, Basic [Abstract] Basic net income per common share: Earnings Per Share, Basic Income per common share from operations Basic net income per common share Weighted average common shares outstanding Weighted average common shares outstanding Basic weighted average common shares outstanding Earnings Per Share, Diluted [Abstract] Diluted net income per common share: Earnings Per Share, Diluted Income per common share from operations Diluted net income per common share Weighted Average Number of Shares Outstanding, Diluted Dilutive weighted average common shares outstanding Weighted average common and common equivalent shares outstanding Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Income Statement Location [Axis] Income Statement Location [Domain] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Cost Of Sales [Member] Cost of Service [Member] Selling General And Administrative Expenses [Member] Selling General and Administrative [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Share based compensation Total share based compensation Non-cash stock compensation expense Consolidated Statements of Comprehensive Income [Abstract] Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation Foreign currency translation adjustment Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income Consolidated Statements of Shareholders' Equity [Abstract] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid In Capital [Member] Additional Paid-in Capital [Member] Treasury Stock [Member] Treasury Stock [Member] Retained Earnings [Member] Accumulated Deficit [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Loss [Member] Shares, Outstanding Ending Balance, Shares Balance, Shares Stock Issued During Period, Value, New Issues Issuance of common stock Stock Issued During Period, Shares, New Issues Issuance of common stock, Shares Treasury Stock, Value, Acquired, Cost Method Treasury stock purchased Total cost Treasury Stock, Shares, Acquired Treasury stock purchased, Shares Repurchase of common stock Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition Amortization of restricted stock units and common stock subject to vesting requirements Dividends, Common Stock, Cash Dividend declared Dividend payment Consolidated Statements of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Depreciation Depreciation expense Amortization of Intangible Assets Amortization expense Amortization of Financing Costs Amortization of debt issuance costs Provision for Doubtful Accounts Provision for doubtful accounts Foreign Currency Transaction Gain (Loss), Unrealized (Gain) loss on foreign currency transactions Share Based Compensation, Acquisition Related Expenses Share Based Compensation, Acquisition Related Expenses Acquisition consideration reflected as compensation expense Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance Deferred income tax expense Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities, net of acquisition: The increase (decrease) during the reporting period in the amount due to the entity from outside sources, including trade accounts receivable, and revenues recognized in excess of billings, as well as any other types of receivables. Increase Decrease Accounts Receivable And Unbilled Revenue Increase in accounts receivable and unbilled revenue The increase (decrease) during the reporting period in the value of prepaid expenses and other assets not separately disclosed in the statement of cash flows. Increase (Decrease) in Prepaid Expense and Other Assets Decrease in prepaid expenses and other assets Increase (Decrease) in Accounts Payable Increase (decrease) in accounts payable Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Increase (decrease) in accrued expenses and other liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments to Acquire Businesses, Gross Cash consideration paid for acquisition Purchase price, cash Cash Acquired from Acquisition Cash acquired in acquisition Increase (Decrease) in Restricted Cash Decrease in restricted cash Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds from Issuance of Debt Proceeds from borrowings Repayments of Long-term Debt Payment of debt borrowings Debt Issuance Cost Debt issuance costs Payments of Ordinary Dividends, Common Stock Dividends paid Proceeds from Issuance of Common Stock Proceeds from issuance of common stock Payments for Repurchase of Common Stock Repurchases of common stock Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate on cash Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information: Income Taxes Paid, Net Cash paid for income taxes Interest Paid Cash paid for interest Basis 0f Presentation and General Information [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis of Presentation and General Information Fair Value Measurement [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurement Accounts Receivable and Unbilled Revenue, Net [Abstract] Accounts Receivable and Unbilled Revenue, Net [Abstract] The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, and revenues recognized in excess of billings, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. Accounts Receivable and Unbilled Revenue, Net [Text Block] Accounts Receivable and Unbilled Revenue, Net Property and Equipment, net [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property and Equipment, Net Accrued Expenses and Other Liabilities [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Expenses and Other Liabilities Lease Commitments [Abstract] Commitments Disclosure [Text Block] Lease Commitments Credit Facility [Abstract] Debt Disclosure [Text Block] Credit Facility Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Stock Based Compensation [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock Based Compensation Shareholders' Equity [Abstract] Treasury Stock [Text Block] Shareholders' Equity Benefit Plan [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] Benefit Plan Transactions With Related Parties [Abstract] Related Party Transactions Disclosure [Text Block] Transactions with Related Parties Litigation [Abstract] Legal Matters and Contingencies [Text Block] Litigation Acquisitions And Investing Activities [Abstract] Business Combination Disclosure [Text Block] Acquisition Geographic and Service Group Information [Abstract] Geographic and service group information. Geographic and Service Group Information [Text Block] Geographic and Service Group Information Quarterly Financial Information [Abstract] Quarterly Financial Information [Text Block] Quarterly Financial Information Schedule II - Valuation and Qualifying Accounts and Reserves [Abstract] Schedule Of Valuation And Qualifying Accounts Disclosure [Text Block] Schedule II - Valuation And Qualifying Accounts And Reserves Nature of business. Nature of Business Policy [Policy Text Block] Nature of Business Consolidation, Policy [Policy Text Block] Basis of Presentation and Consolidation Fiscal Period, Policy [Policy Text Block] Fiscal Year Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Restricted Cash Receivables, Policy [Policy Text Block] Allowance for Doubtful Accounts Dividends. Dividends [Policy Text Block] Dividends Property Plant And Equipment Policy [Text Block] Property and Equipment, Net Impairment Or Disposal Of Long Lived Assets Policy [Text Block] Long-Lived Assets (excluding Goodwill and Other Intangible Assets) Business Combinations Policy [Policy Text Block] Business Combinations Goodwill and Intangible Assets, Policy [Policy Text Block] Goodwill and Other Intangible Assets Revenue Recognition Policy [Text Block] Revenue Recognition Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Stock Based Compensation Lease, Policy [Policy Text Block] Restructuring Reserves Income Tax, Policy [Policy Text Block] Income Taxes Earnings Per Share, Policy [Policy Text Block] Net Income per Common Share Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Credit Risk Use of Estimates, Policy [Policy Text Block] Management’s Estimates Comprehensive Income, Policy [Policy Text Block] Other Comprehensive Income Foreign Currency Transactions And Translations Policy [Text Block] Translation of Non-U.S. Currency Amounts Segment Reporting Policy Policy [Text Block] Segment Reporting