Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Goodwill by reportable segment [Roll Forward]
Balance as of December 31, 2013	$ 100,697,000
Balance as of March 31, 2014	100,697,000
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance	125,430,000	134,180,000
Amortization	(2,019,000)	(2,273,000)
Ending Balance	123,411,000	131,907,000
Goodwill [Abstract]
Gross Amount	100,697,000		100,697,000
Accumulated Amortization	0		0
Carrying Amount	100,697,000
Other intangible assets [Abstract]
Gross Amount	194,694,000		194,694,000
Accumulated Amortization	71,283,000		69,264,000
Carrying Amount	123,411,000	131,907,000
Estimated amortization expense for other intangible assets, 2014	8,100,000
Estimated amortization expense for other intangible assets, 2015	8,100,000
Estimated amortization expense for other intangible assets, 2016	8,100,000
Estimated amortization expense for other intangible assets, 2017	8,100,000
Estimated amortization expense for other intangible assets, 2018	8,100,000
Trade names [Member]
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance			25,200,000
Ending Balance	25,200,000		25,200,000
Other intangible assets [Abstract]
Gross Amount	25,200,000		25,200,000
Accumulated Amortization	0		0
Carrying Amount	25,200,000		25,200,000
Technology [Member]
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance	18,352,000
Ending Balance	17,616,000
Other intangible assets [Abstract]
Weighted Average Useful Lives	10 years
Gross Amount	38,849,000		38,849,000
Accumulated Amortization	21,233,000		20,497,000
Carrying Amount	17,616,000
Customer relationships [Member]
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance	81,878,000
Ending Balance	80,595,000
Other intangible assets [Abstract]
Weighted Average Useful Lives	19 years 10 months 24 days
Gross Amount	129,093,000		129,093,000
Accumulated Amortization	48,498,000		47,215,000
Carrying Amount	80,595,000
Wheels [Member]
Goodwill by reportable segment [Roll Forward]
Balance as of December 31, 2013	96,283,000
Balance as of March 31, 2014	96,283,000
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance	122,764,000	130,668,000
Amortization	(1,977,000)	(1,975,000)
Ending Balance	120,787,000	128,693,000
Goodwill [Abstract]
Carrying Amount	96,283,000
Other intangible assets [Abstract]
Carrying Amount	120,787,000	128,693,000
Brillion Iron Works [Member]
Goodwill by reportable segment [Roll Forward]
Balance as of December 31, 2013	4,414,000
Balance as of March 31, 2014	4,414,000
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance	2,666,000	2,833,000
Amortization	(42,000)	(41,000)
Ending Balance	2,624,000	2,792,000
Goodwill [Abstract]
Carrying Amount	4,414,000
Other intangible assets [Abstract]
Carrying Amount	2,624,000	2,792,000
Corporate / Other [Member]
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance		679,000
Amortization		(257,000)
Ending Balance		422,000
Other intangible assets [Abstract]
Carrying Amount		$ 422,000