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
Net income	$ 99,418us-gaap_ProfitLoss	$ 88,784us-gaap_ProfitLoss	$ 75,332us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	29,374us-gaap_Depreciation	25,201us-gaap_Depreciation	25,344us-gaap_Depreciation
Amortization of intangibles	12,501us-gaap_AmortizationOfIntangibleAssets	9,279us-gaap_AmortizationOfIntangibleAssets	6,089us-gaap_AmortizationOfIntangibleAssets
Impairment of assets	293		549
Provision for bad debts	130us-gaap_ProvisionForDoubtfulAccounts	289us-gaap_ProvisionForDoubtfulAccounts	242us-gaap_ProvisionForDoubtfulAccounts
Non-cash inventory charge	2,769us-gaap_InventoryWriteDown	1,525us-gaap_InventoryWriteDown	567us-gaap_InventoryWriteDown
Pension settlement losses			5,348
Impairment and equity in net loss of unconsolidated affiliate		10,678us-gaap_OtherAssetImpairmentCharges	7,334us-gaap_OtherAssetImpairmentCharges
Loss (gain) on sale of property, plant and equipment	1,042	92	(1,443)
Stock-based compensation	9,069us-gaap_ShareBasedCompensation	8,609us-gaap_ShareBasedCompensation	7,348us-gaap_ShareBasedCompensation
Excess tax benefit on share-based compensation	(2,843)	(4,054)	(2,728)
Deferred income taxes	(4,488)	6,640	(2,661)
Changes in operating assets and liabilities:
Accounts receivable	(13,062)	(16,683)	(1,587)
Inventories	(2,258)us-gaap_IncreaseDecreaseInInventories	(5,486)us-gaap_IncreaseDecreaseInInventories	5,439us-gaap_IncreaseDecreaseInInventories
Accounts payable	17,281	2,000	5,353
Accrued expenses (including post-retirement)	(1,577)	(8,906)	(9,570)
Accrued payroll and severance	2,360	8,032	(4,387)
Accrued taxes	(549)	(10,773)	(357)
Prepaid expenses and other	3,681	2,140	(42)
Net cash provided by operating activities	153,141	117,367	116,170
Investing activities
Acquisitions of businesses, net of cash acquired	(56,368)	(144,382)	(34,016)
Purchases of short-term investments	(4,331)	(8,478)	(4,616)
Proceeds from maturities of short-term investments	6,770	2,044	17,805
Investments in unconsolidated affiliate			(10,000)
Loan to unconsolidated affiliate			(2,000)
Increase in entrusted loan receivable (see note 7)	(17,908)
Purchases of property, plant and equipment	(32,281)	(34,953)	(22,529)
Proceeds from sale of property, plant and equipment	125	176	3,664
Net cash used in investing activities	(103,993)	(185,593)	(51,692)
Financing activities
Proceeds from debt	97,500	260,500	23,251
Payments of term debt	(5,000)us-gaap_RepaymentsOfLongTermDebt	(1,250)us-gaap_RepaymentsOfLongTermDebt
Payments of revolving credit facility	(135,000)us-gaap_RepaymentsOfLinesOfCredit	(123,500)us-gaap_RepaymentsOfLinesOfCredit	(25,032)us-gaap_RepaymentsOfLinesOfCredit
Proceeds from exercise of stock options	14,061	21,959	16,367
Proceeds from entrusted loan (see note 7)	17,908
Debt issuance costs	(107)us-gaap_PaymentsOfDebtIssuanceCosts	(809)us-gaap_PaymentsOfDebtIssuanceCosts
Cash dividends paid	(21,175)us-gaap_PaymentsOfDividends	(18,722)us-gaap_PaymentsOfDividends	(16,564)us-gaap_PaymentsOfDividends
Excess tax benefit on share-based compensation	2,843	4,054	2,728
Purchases of common stock	(14,283)
Net cash (used in) provided by financing activities	(43,253)	142,232	750
Effect of exchange rate changes on cash and cash equivalents	(13,516)	(4,218)	6,160
(Decrease) increase in cash and cash equivalents	(7,621)	69,788	71,388
Cash and cash equivalents at beginning of year	305,192	235,404	164,016
Cash and cash equivalents at end of year	$ 297,571	$ 305,192	$ 235,404

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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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.

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-Publisher FASB

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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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.

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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