Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
OPERATING ACTIVITIES
Net income	$ 87,024	$ 78,663	$ 9,411
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	25,641	26,980	31,596
Impairment of assets	2,320	2,988	829
Non-cash inventory charge	4,145
Amortization of intangibles	6,611	5,025	5,026
Provision for bad debts	444	353	319
Loss (gain) on sale of property, plant and equipment	183	(615)	703
Stock-based compensation	5,805	5,243	5,503
Excess tax benefit on share-based compensation	(4,220)	(1,617)	(15)
Deferred income taxes	(1,363)	7,784	(2,905)
Changes in operating assets and liabilities:
Accounts receivable	4,768	(12,804)	(15,569)
Inventories	2,612	(15,147)	15,549
Accounts payable	(5,272)	(1,800)	4,360
Accrued expenses (including post-retirement)	(421)	(13,645)	(12,294)
Accrued payroll and severance	(3,226)	2,384	(9,018)
Accrued taxes	(6,057)	14,878	(3,322)
Prepaid expenses and other	1,756	5,399	(562)
Net cash provided by operating activities	120,750	104,069	29,611
INVESTING ACTIVITIES
Purchases of property, plant and equipment	(17,555)	(22,433)	(15,536)
Acquisitions of businesses, net of cash acquired	(11,077)	(48,292)	(920)
Purchases of short-term investments	(14,228)
Purchases of other investment	(6,000)
Proceeds from sale of investment			133
Proceeds from sale of property, plant and equipment	217	4,997	1,558
Net cash used in investing activities	(48,643)	(65,728)	(14,765)
FINANCING ACTIVITIES
Proceeds from debt	110,000	39,345	32,374
Payments of term debt	(49,000)	(8,000)	(19,000)
Payments of revolving credit facility	(50,000)	(20,624)	(31,076)
Proceeds from exercise of stock options	23,036	18,496	1,505
Debt issuance costs	(716)
Cash dividends paid	(14,508)	(3,248)
Excess tax benefit on share-based compensation	4,220	1,617	15
Purchases of common stock	(37,092)	(25,377)
Net cash (used in) provided by financing activities	(14,060)	2,209	(16,182)
Effect of exchange rate changes on cash and cash equivalents	(3,751)	(1,184)	753
Increase (decrease) in cash and cash equivalents	54,296	39,366	(583)
Cash and cash equivalents at beginning of year	109,720	70,354	70,937
Cash and cash equivalents at end of year	$ 164,016	$ 109,720	$ 70,354