Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 2,743	$ 3,412	$ 3,989
Charged to Cost and Expenses	2,036	1,074	2,456
Divestures/Acquisitions	653	(146)	69
Charge Offs	(1,833)	(1,367)	(2,092)
Recoveries	(950)	(156)	(1,062)
Currency Movement	(2)	(74)	52
Ending Balance	2,647	2,743	3,412
Obsolescence and Other Valuation Allowances [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	22,277	18,225	22,723
Charged to Cost and Expenses	2,322	3,751	6,697
Divestures/Acquisitions	889	1,924	(865)
Charge Offs	(5,674)	330	(8,306)
Recoveries	(1,162)	(1,281)	(2,296)
Currency Movement	(11)	(672)	272
Ending Balance	18,641	22,277	18,225
Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	32,777	33,735	32,285
Charged to Cost and Expenses	2,608	2,044	6,557
Divestures/Acquisitions	350
Charge Offs		(1,670)	(5,173)
Recoveries	(10,587)	(852)	(1,279)
Currency Movement	(203)	(480)	1,345
Ending Balance	$ 24,945	$ 32,777	$ 33,735