Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Taxes, other than income taxes	$ 4,768	$ 5,629
Warranty	9,357	8,759
Deferred revenue	1,878	3,159
Rebates	6,983	5,185
Freight	3,999	3,945
Miscellaneous accrued expenses	8,115	8,974
Other	3,744	3,753
Total	38,844	39,404
Changes in warranty reserves
Beginning balance	8,759	7,043	5,985
Product warranty provision	12,395	12,815	10,506
(Divested) acquired reserves	(236)	10	0
Foreign currency	(15)	(63)	(88)
Claims paid	(11,546)	(11,046)	(9,360)
Ending balance	$ 9,357	$ 8,759	$ 7,043