Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Operating activities:
Net income	$ 41,442	$ 40,526
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	12,748	12,659
Amortization of intangibles	3,502	2,858
Stock-based compensation	4,562	3,725
Non-cash inventory charge	1,725	205
Excess tax benefit on share-based compensation	(3,494)	(2,246)
Loss on sale of assets	120	60
Impairment and equity in net loss of unconsolidated affiliate	10,678	1,558
Changes in operating assets and liabilities:
Accounts receivable	(20,246)	(21,679)
Inventories	3,354	(2,150)
Accounts payable	4,655	7,173
Accrued expenses (including post-retirement)	(11,477)	(6,930)
Accrued payroll and severance	(1,725)	(3,163)
Accrued taxes	(7,563)	502
Prepaid expenses and other	724	(521)
Net cash provided by operating activities	39,005	32,577
Investing activities:
Purchases of property, plant, and equipment	(14,445)	(6,747)
Acquisition of businesses, net of cash acquired	(145,000)	(23,521)
Purchase of investment		(10,000)
Purchase of short-term investments	(8,478)	(4,616)
Proceeds from sale of short-term investments		12,401
Proceeds from sale of assets	56	441
Net cash used in investing activities	(167,867)	(32,042)
FINANCING activities:
Proceeds from term loan	100,000	17,000
Proceeds from revolving credit facility	152,000
Payments of revolving credit facility	(103,000)	(17,500)
Debt issuance costs paid	(808)
Cash dividends paid	(8,865)	(7,806)
Proceeds from exercise of stock options	15,401	10,698
Excess tax benefit on share-based compensation	3,494	2,246
Net cash provided by financing activities	158,222	4,638
Effect of exchange rate changes on cash and cash equivalents	(7,092)	(371)
Increase in cash and cash equivalents	22,268	4,802
Cash and cash equivalents at beginning of period	235,404	164,016
Cash and cash equivalents at end of period	$ 257,672	$ 168,818