Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Goodwill by reportable segment [Roll Forward]
Balance as of December 31, 2013	$ 100,697,000
Balance as of September 30, 2014	100,697,000
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance	117,963,000	125,430,000
Amortization	(2,039,000)	(2,019,000)
Ending Balance	115,924,000	123,411,000
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	191,673,000		191,673,000
Accumulated Amortization	75,749,000		73,710,000
Carrying Amount	115,924,000	123,411,000
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	16,011,000
Ending Balance	15,255,000
Other intangible assets [Abstract]
Weighted Average Useful Lives	10 years 7 months 6 days
Gross Amount	39,169,000		39,169,000
Accumulated Amortization	23,914,000		23,158,000
Carrying Amount	15,255,000
Customer relationships [Member]
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance	76,752,000
Ending Balance	75,469,000
Other intangible assets [Abstract]
Weighted Average Useful Lives	16 years 9 months 18 days
Gross Amount	127,304,000		127,304,000
Accumulated Amortization	51,835,000		50,552,000
Carrying Amount	75,469,000
Wheels [Member]
Goodwill by reportable segment [Roll Forward]
Balance as of December 31, 2013	96,283,000
Balance as of September 30, 2014	96,283,000
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance	115,465,000	122,764,000
Amortization	(1,997,000)	(1,977,000)
Ending Balance	113,468,000	120,787,000
Goodwill [Abstract]
Carrying Amount	96,283,000
Other intangible assets [Abstract]
Carrying Amount	113,468,000	120,787,000
Brillion Iron Works [Member]
Goodwill by reportable segment [Roll Forward]
Balance as of December 31, 2013	4,414,000
Balance as of September 30, 2014	4,414,000
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance	2,498,000	2,666,000
Amortization	(42,000)	(42,000)
Ending Balance	2,456,000	2,624,000
Goodwill [Abstract]
Carrying Amount	4,414,000
Other intangible assets [Abstract]
Carrying Amount	$ 2,456,000	$ 2,624,000