Supplemental Guarantor Information (Details) (USD $) In Thousands, unless otherwise specified	Apr. 01, 2012	Dec. 31, 2011	Apr. 03, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 370,017	$ 382,716	$ 323,085	$ 358,653
Receivables, net	289,915	299,070
Inventories, net	200,900	202,143
Deferred income taxes	20,123	19,660
Other current assets	20,781	21,832
Total current assets	901,736	925,421
Property, plant and equipment, less accumulated depreciation	290,257	286,933
Goodwill	349,552	348,032
Intangible assets, less accumulated amortization	149,419	151,683
Deferred income taxes	9,816	12,219
Other long-lived assets	66,946	63,832
Total assets	1,767,726	1,788,120
Current liabilities:
Accounts payable	222,725	227,571
Accrued liabilities	123,732	153,995
Total current liabilities	346,457	381,566
Long-term debt	550,295	550,926
Postretirement benefits	133,948	131,237
Other long-term liabilities	29,138	29,842
Total stockholders' equity	707,888	694,549
Total liabilities and stockholders' equity	1,767,726	1,788,120
Issuer [Member]
Current assets:
Cash and cash equivalents	53,454	92,586	101,817	173,699
Receivables, net	108,123	117,920
Inventories, net	120,976	125,168
Deferred income taxes	15,737	15,737
Other current assets	9,616	10,121
Total current assets	307,906	361,532
Property, plant and equipment, less accumulated depreciation	134,100	132,909
Goodwill	242,808	242,808
Intangible assets, less accumulated amortization	76,242	77,455
Deferred income taxes	(3,182)	(1,829)
Other long-lived assets	13,099	13,666
Investment in subsidiaries	1,325,084	1,306,843
Total assets	2,096,057	2,133,384
Current liabilities:
Accounts payable	90,793	94,647
Accrued liabilities	49,582	73,579
Total current liabilities	140,375	168,226
Long-term debt	550,295	550,926
Postretirement benefits	33,255	42,855
Other long-term liabilities	23,092	23,628
Intercompany accounts	(43,165)	(33,617)
Total stockholders' equity	1,392,205	1,381,366
Total liabilities and stockholders' equity	2,096,057	2,133,384
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	316,563	290,130	221,268	184,954
Receivables, net	181,792	181,150
Inventories, net	79,924	76,975
Deferred income taxes	4,386	3,923
Other current assets	11,165	11,711
Total current assets	593,830	563,889
Property, plant and equipment, less accumulated depreciation	156,157	154,024
Goodwill	106,744	105,224
Intangible assets, less accumulated amortization	73,177	74,228
Deferred income taxes	12,998	14,048
Other long-lived assets	53,847	50,166
Total assets	996,753	961,579
Current liabilities:
Accounts payable	131,932	132,924
Accrued liabilities	74,150	80,416
Total current liabilities	206,082	213,340
Postretirement benefits	100,693	88,382
Other long-term liabilities	6,046	6,214
Intercompany accounts	43,165	33,617
Total stockholders' equity	640,767	620,026
Total liabilities and stockholders' equity	996,753	961,579
Eliminations [Member]
Current assets:
Investment in subsidiaries	(1,325,084)	(1,306,843)
Total assets	(1,325,084)	(1,306,843)
Current liabilities:
Total stockholders' equity	(1,325,084)	(1,306,843)
Total liabilities and stockholders' equity	$ (1,325,084)	$ (1,306,843)