Supplemental Guarantor Information (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Current assets:
Cash and cash equivalents	$ 382,716	$ 358,653	$ 308,879	$ 227,413
Receivables, net	299,070	298,266
Inventories, net	202,143	175,659
Deferred income taxes	19,660	9,473
Other current assets	21,832	18,804
Total current assets	925,421	860,855
Property, plant and equipment, less accumulated depreciation	286,933	278,866
Goodwill	348,032	322,556	273,126
Intangible assets, less accumulated amortization	151,683	143,820
Deferred income taxes	12,219	27,565
Other long-lived assets	63,832	62,822
Investment in subsidiaries	0	0
Total assets	1,788,120	1,696,484	1,620,578
Current liabilities:
Accounts payable	227,571	212,084
Accrued liabilities	153,995	145,840
Total current liabilities	381,566	357,924
Long-term debt	550,926	551,155
Postretirement benefits	131,237	112,426
Other long-term liabilities	29,842	36,464
Intercompany accounts	0	0
Total stockholders' equity	694,549	638,515	551,048	570,868
Total liabilities and stockholders' equity	1,788,120	1,696,484
Issuer [Member]
Current assets:
Cash and cash equivalents	92,586	173,699	58,855	57,652
Receivables, net	117,920	117,303
Inventories, net	125,168	109,127
Deferred income taxes	15,737	5,590
Other current assets	10,121	10,199
Total current assets	361,532	415,918
Property, plant and equipment, less accumulated depreciation	132,909	120,857
Goodwill	242,808	258,094
Intangible assets, less accumulated amortization	77,455	93,695
Deferred income taxes	(1,829)	9,342
Other long-lived assets	13,666	12,771
Investment in subsidiaries	1,306,843	1,227,959
Total assets	2,133,384	2,138,636
Current liabilities:
Accounts payable	94,647	92,996
Accrued liabilities	73,579	78,013
Total current liabilities	168,226	171,009
Long-term debt	550,926	551,155
Postretirement benefits	42,855	27,949
Other long-term liabilities	23,628	30,047
Intercompany accounts	(33,617)	(249,051)
Total stockholders' equity	1,381,366	1,607,527
Total liabilities and stockholders' equity	2,133,384	2,138,636
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	290,130	184,954	250,024	169,761
Receivables, net	181,150	180,963
Inventories, net	76,975	66,532
Deferred income taxes	3,923	3,883
Other current assets	11,711	8,605
Total current assets	563,889	444,937
Property, plant and equipment, less accumulated depreciation	154,024	158,009
Goodwill	105,224	64,462
Intangible assets, less accumulated amortization	74,228	50,125
Deferred income taxes	14,048	18,223
Other long-lived assets	50,166	50,051
Investment in subsidiaries	0	0
Total assets	961,579	785,807
Current liabilities:
Accounts payable	132,924	119,088
Accrued liabilities	80,416	67,827
Total current liabilities	213,340	186,915
Long-term debt	0	0
Postretirement benefits	88,382	84,477
Other long-term liabilities	6,214	6,417
Intercompany accounts	33,617	249,051
Total stockholders' equity	620,026	258,947
Total liabilities and stockholders' equity	961,579	785,807
Eliminations [Member]
Current assets:
Cash and cash equivalents	0	0
Receivables, net	0	0
Inventories, net	0	0
Deferred income taxes	0	0
Other current assets	0	0
Total current assets	0	0
Property, plant and equipment, less accumulated depreciation	0	0
Goodwill	0	0
Intangible assets, less accumulated amortization	0	0
Deferred income taxes	0	0
Other long-lived assets	0	0
Investment in subsidiaries	(1,306,843)	(1,227,959)
Total assets	(1,306,843)	(1,227,959)
Current liabilities:
Accounts payable	0	0
Accrued liabilities	0	0
Total current liabilities	0	0
Long-term debt	0	0
Postretirement benefits	0	0
Other long-term liabilities	0	0
Intercompany accounts	0	0
Total stockholders' equity	(1,306,843)	(1,227,959)
Total liabilities and stockholders' equity	$ (1,306,843)	$ (1,227,959)