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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 27, 2014 | Dec. 28, 2013 | Dec. 29, 2012
OPERATING ACTIVITIES OF CONTINUING OPERATIONS |  |  |
Net income | $ 138,809 us-gaap_NetIncomeLoss | $ 146,009 us-gaap_NetIncomeLoss | $ 129,781 us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations: |  |  |
Discontinued operations |  | (37,087)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (3,215)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Depreciation and amortization of operating property | 27,575 us-gaap_DepreciationAndAmortization | 27,667 us-gaap_DepreciationAndAmortization | 25,213 us-gaap_DepreciationAndAmortization
Non-cash interest charges | 218 us-gaap_AmortizationOfDeferredCharges | 219 us-gaap_AmortizationOfDeferredCharges | 218 us-gaap_AmortizationOfDeferredCharges
Provisions for losses on trade and other accounts receivable | 5,315 us-gaap_ProvisionForDoubtfulAccounts | 3,755 us-gaap_ProvisionForDoubtfulAccounts | 4,886 us-gaap_ProvisionForDoubtfulAccounts
Gains on sales/disposals of operating property | (2,143)us-gaap_GainLossOnSaleOfPropertyPlantEquipment | (3,352)us-gaap_GainLossOnSaleOfPropertyPlantEquipment | (2,815)us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Deferred income taxes, net | 5,434 us-gaap_IncreaseDecreaseInDeferredIncomeTaxes | 4,700 us-gaap_IncreaseDecreaseInDeferredIncomeTaxes | 4,261 us-gaap_IncreaseDecreaseInDeferredIncomeTaxes
Stock-based compensation | 6,797 us-gaap_ShareBasedCompensation | 4,911 us-gaap_ShareBasedCompensation | 6,149 us-gaap_ShareBasedCompensation
Changes in operating assets and liabilities, net of discontinued operations: |  |  |
Increase in trade and other accounts receivable | (60,454)us-gaap_IncreaseDecreaseInReceivables | (28,584)us-gaap_IncreaseDecreaseInReceivables | (35,140)us-gaap_IncreaseDecreaseInReceivables
(Increase) decrease in other assets | (9,046)us-gaap_IncreaseDecreaseInOtherOperatingAssets | (1,214)us-gaap_IncreaseDecreaseInOtherOperatingAssets | 2,547 us-gaap_IncreaseDecreaseInOtherOperatingAssets
Increase in accounts payable | 62,281 us-gaap_IncreaseDecreaseInAccountsPayable | 8,881 us-gaap_IncreaseDecreaseInAccountsPayable | 13,018 us-gaap_IncreaseDecreaseInAccountsPayable
Decrease in other liabilities | (2,468)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | (3,308)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | (6,857)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
(Decrease) increase in insurance claims | (70,449)us-gaap_IncreaseDecreaseInInsuranceLiabilities | 30,048 us-gaap_IncreaseDecreaseInInsuranceLiabilities | (17,715)us-gaap_IncreaseDecreaseInInsuranceLiabilities
NET CASH PROVIDED BY OPERATING ACTIVITIES OF CONTINUING OPERATIONS | 101,869 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 152,645 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 120,331 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
INVESTING ACTIVITIES OF CONTINUING OPERATIONS |  |  |
Sales and maturities of investments | 34,701 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities | 38,777 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities | 33,028 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Purchases of investments | (36,473)us-gaap_PaymentsToAcquireMarketableSecurities | (50,613)us-gaap_PaymentsToAcquireMarketableSecurities | (56,897)us-gaap_PaymentsToAcquireMarketableSecurities
Purchases of operating property | (10,539)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (6,373)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (5,388)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from sales of operating property | 7,465 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 9,711 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 9,730 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Proceeds from sale of discontinued operations |  | 74,505 us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested |
NET CASH (USED) PROVIDED BY INVESTING ACTIVITIES OF CONTINUING OPERATIONS | (4,846)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | 66,007 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (19,527)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
FINANCING ACTIVITIES OF CONTINUING OPERATIONS |  |  |
Increase (decrease) in cash overdraft | 6,849 us-gaap_ProceedsFromRepaymentsOfBankOverdrafts | 2,617 us-gaap_ProceedsFromRepaymentsOfBankOverdrafts | (339)us-gaap_ProceedsFromRepaymentsOfBankOverdrafts
Dividends paid | (27,606)us-gaap_PaymentsOfDividends |  | (33,981)us-gaap_PaymentsOfDividends
Proceeds from exercises of stock options | 3,760 us-gaap_ProceedsFromStockOptionsExercised | 2,323 us-gaap_ProceedsFromStockOptionsExercised | 4,383 us-gaap_ProceedsFromStockOptionsExercised
Taxes paid in lieu of shares issued related to stock-based compensation plans | (4,041)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation | (1,766)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation | (3,023)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Excess tax effect on stock option exercises | 2,500 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 349 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 751 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Borrowings on revolving credit facility |  |  | 60,000 us-gaap_ProceedsFromLinesOfCredit
Purchases of common stock | (56,393)us-gaap_PaymentsForRepurchaseOfCommonStock | (59,496)us-gaap_PaymentsForRepurchaseOfCommonStock | (25,826)us-gaap_PaymentsForRepurchaseOfCommonStock
Principal payments on long-term debt and capital lease obligations | (37,416)us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities | (61,774)us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities | (121,278)us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
NET CASH USED BY FINANCING ACTIVITIES OF CONTINUING OPERATIONS | (112,347)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (117,747)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (119,313)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Cash flows from discontinued operations: |  |  |
Operating activities of discontinued operations |  | 9,368 us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations | 5,253 us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
Investing activities of discontinued operations |  | (168)us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations | (1,684)us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
Financing activities of discontinued operations |  | (3,369)us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations | 8,081 us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
Net cash provided by discontinued operations |  | 5,831 us-gaap_NetCashProvidedByUsedInDiscontinuedOperations | 11,650 us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
Effect of exchange rate changes on cash and cash equivalents | (1,034)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | (718)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | 243 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
(Decrease) increase in cash and cash equivalents | (16,358)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 106,018 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (6,616)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period | 180,302 us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations | 74,284 us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations | 80,900 us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations
Cash and cash equivalents at end of period | $ 163,944 us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations | $ 180,302 us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations | $ 74,284 us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations

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- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 + 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 Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + 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 Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + 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 (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + 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 associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed 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 This element represents the cash inflow during the period from the sale of a component of the entity. + 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 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 Reference 3: 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 4: 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 net cash inflow or outflow from the excess drawing from an existing cash balance, which will be honored by the bank but reflected as a loan to the drawer. + 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 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + 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 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + 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 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: 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 Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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- Definition The cash outflow associated with security instruments that either represent a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. Includes repayments of (a) debt, (b) capital lease obligations, (c) mandatory redeemable capital securities, and (d) any combination of (a), (b), or (c). + 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),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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