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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 28, 2015 | Mar. 29, 2014
Cash flows relating to operating activities |  |
Net income | $ 31,614 us-gaap_ProfitLoss | $ 32,358 us-gaap_ProfitLoss
Less: Loss from discontinued operations | (7)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (270)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Income from continuing operations | 31,621 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 32,628 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities: |  |
Depreciation and amortization | 22,368 us-gaap_DepreciationDepletionAndAmortization | 20,050 us-gaap_DepreciationDepletionAndAmortization
Amortization of debt issuance costs | 423 us-gaap_AmortizationOfFinancingCostsAndDiscounts | 435 us-gaap_AmortizationOfFinancingCostsAndDiscounts
Stock-based compensation | 9,674 us-gaap_ShareBasedCompensation | 6,659 us-gaap_ShareBasedCompensation
Deferred income taxes | 9,474 us-gaap_DeferredIncomeTaxesAndTaxCredits | 13,064 us-gaap_DeferredIncomeTaxesAndTaxCredits
Gain on investments in limited partnerships | (1,271)us-gaap_IncomeLossFromEquityMethodInvestments | (6,104)us-gaap_IncomeLossFromEquityMethodInvestments
Other, net | (917)us-gaap_OtherNoncashIncomeExpense | 1,380 us-gaap_OtherNoncashIncomeExpense
Changes in assets and liabilities: |  |
Trade receivables, net | (18,302)us-gaap_IncreaseDecreaseInAccountsReceivable | (20,224)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories | 431 us-gaap_IncreaseDecreaseInInventories | (2,294)us-gaap_IncreaseDecreaseInInventories
Other assets | (5,448)us-gaap_IncreaseDecreaseInOtherOperatingAssets | (5,991)us-gaap_IncreaseDecreaseInOtherOperatingAssets
Accounts payable | 3,038 us-gaap_IncreaseDecreaseInAccountsPayable | 6,310 us-gaap_IncreaseDecreaseInAccountsPayable
Accrued compensation | (17,252)us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities | (5,839)us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
Deferred revenue | 1,321 us-gaap_IncreaseDecreaseInDeferredRevenue | 615 us-gaap_IncreaseDecreaseInDeferredRevenue
Accrued liabilities | (2,742)us-gaap_IncreaseDecreaseInAccruedLiabilities | 6,933 us-gaap_IncreaseDecreaseInAccruedLiabilities
Taxes payable and prepaid taxes | (20,639)us-gaap_IncreaseDecreaseInAccruedTaxesPayable | (16,497)us-gaap_IncreaseDecreaseInAccruedTaxesPayable
Other liabilities | (527)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | (2,662)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net cash provided by operating activities | 11,252 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 28,463 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash flows relating to investing activities |  |
Acquisition of businesses and assets, net of cash acquired | (893)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | 0 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Capital expenditures | (10,648)us-gaap_PaymentsToAcquireProductiveAssets | (11,190)us-gaap_PaymentsToAcquireProductiveAssets
Purchases of investments | (9,724)us-gaap_PaymentsToAcquireMarketableSecurities | (6,705)us-gaap_PaymentsToAcquireMarketableSecurities
Proceeds from sale of investments and distributions from investments in limited partnerships | 8,288 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities | 11,066 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Other, net | 684 us-gaap_PaymentsForProceedsFromOtherInvestingActivities | 318 us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Net cash used in investing activities | (12,293)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (6,511)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash flows relating to financing activities |  |
Proceeds from long-term debt and revolving credit agreement | 39,828 us-gaap_ProceedsFromOtherDebt | 49,352 us-gaap_ProceedsFromOtherDebt
Proceeds from exercises of stock options | 34,136 us-gaap_ProceedsFromOtherEquity | 34,841 us-gaap_ProceedsFromOtherEquity
Payments on long-term debt, capital lease obligations and revolving credit agreement | (23,678)us-gaap_RepaymentsOfOtherDebt | (72,589)us-gaap_RepaymentsOfOtherDebt
Purchase of treasury stock | (58,632)us-gaap_PaymentsForRepurchaseOfCommonStock | (20,812)us-gaap_PaymentsForRepurchaseOfCommonStock
Other, net | 10,280 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities | 3,064 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Net cash provided by (used in) financing activities | 1,934 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (6,144)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Discontinued operations |  |
Net cash used in operating activities from discontinued operations | (316)us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations | (664)us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
Effect of exchange rate changes on cash and cash equivalents | (8,681)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | (1,221)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net change in cash and cash equivalents | (8,104)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 13,923 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period | 160,023 us-gaap_CashAndCashEquivalentsAtCarryingValue | 155,927 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period | $ 151,919 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 169,850 us-gaap_CashAndCashEquivalentsAtCarryingValue

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- Definition Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Cash outflow for purchase of trading, available-for-sale securities and held-to-maturity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow from other borrowing not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow from other equity not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686 + Details
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- Definition The cash outflow for the payment of other borrowing not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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