Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Revenue	$ 87,366	$ 108,825
Earnings (loss) from operations before taxes	5,609	5,734
Benefit (provision) for income taxes	7,405	3,920
Earnings from discontinued operations, net of tax	13,014	9,654
Assets of Discontinued Operations
Accounts receivable	63,376		63,229
Inventories, net	55,128		51,252
Prepaid and other current assets	16,822		10,263
Current assets	135,326		124,744
Property, plant and equipment, net	32,904		31,935
Goodwill and intangible assets, net	235,317		238,657
Other assets and deferred charges	2,376		2,209
Total assets of discontinued operations	405,923		397,545
Liabilities of Discontinued Operations
Accounts payable	23,814		22,613
Other current liabilities	29,618		34,592
Current liabilities	53,432		57,205
Deferred income taxes	65,000		64,853
Other liabilities	86,381		86,900
Total liabilities of discontinued operations	$ 204,813		$ 208,958