Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013
OPERATING ACTIVITIES:
Net income	$ 49,967	$ 38,136
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	14,459	12,748
Amortization of intangibles	6,297	3,502
Stock-based compensation	5,229	4,562
Non-cash inventory charge	2,769	1,725
Excess tax benefit on share-based compensation	(2,230)	(3,494)
Loss on sale of assets	141	120
Impairment and equity in net loss of unconsolidated affiliate		10,678
Changes in operating assets and liabilities:
Accounts receivable	(17,871)	(20,246)
Inventories	410	3,354
Accounts payable	2,533	4,655
Accrued expenses (including post-retirement)	(7,578)	(11,477)
Accrued payroll and severance	(7,323)	(1,725)
Accrued taxes	(2,101)	(4,257)
Prepaid expenses and other	(2,189)	724
Net cash provided by operating activities	42,513	39,005
INVESTING ACTIVITIES:
Purchases of property, plant, and equipment	(13,132)	(14,445)
Acquisition of businesses, net of cash acquired	(52,768)	(145,000)
Purchase of short-term investments		(8,478)
Proceeds from sale of assets	37	56
Net cash used in investing activities	(65,863)	(167,867)
FINANCING ACTIVITIES:
Proceeds from term loan		100,000
Proceeds from revolving credit facility	97,500	152,000
Payments of term loan	(2,500)
Payments of revolving credit facility	(19,500)	(103,000)
Debt issuance costs paid	(108)	(808)
Cash dividends paid	(9,921)	(8,865)
Purchases of common stock	(14,283)
Proceeds from exercise of stock options	11,101	15,401
Excess tax benefit on share-based compensation	2,230	3,494
Net cash provided by financing activities	64,519	158,222
Effect of exchange rate changes on cash and cash equivalents	45	(7,092)
Increase in cash and cash equivalents	41,214	22,268
Cash and cash equivalents at beginning of period	305,192	235,404
Cash and cash equivalents at end of period	$ 346,406	$ 257,672