Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands		9 Months Ended
	Jul. 02, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
Goodwill by reportable segment [Roll Forward]
Balance as of December 31, 2014		$ 100,697
Balance as of June 30, 2015		100,697
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance		117,963	$ 125,430
Additions		1,903	671
Amortization		(6,174)	(6,097)
Ending Balance		113,692	120,004
Goodwill [Abstract]
Gross Amount				$ 100,697	$ 100,697
Accumulated Amortization				0	0
Carrying Amount		100,697		100,697	100,697
Other intangible assets [Abstract]
Gross Amount				193,576	191,673
Accumulated Amortization				79,884	73,710
Carrying Amount		117,963	125,430	113,692	117,963
Estimated amortization expense for other intangible assets, 2015				8,300
Estimated amortization expense for other intangible assets, 2016				8,600
Estimated amortization expense for other intangible assets, 2017				8,600
Estimated amortization expense for other intangible assets, 2018				8,600
Estimated amortization expense for other intangible assets, 2019				8,600
Payments to Acquire Intangible Assets	$ 1,900	1,903	671
Payments to Acquire Productive Assets	2,000
Payments to Acquire Other Property, Plant, and Equipment	100
Contingent Consideration on Asset Acquisition	$ 8,000
Trade names [Member]
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance		25,200
Ending Balance		25,200
Other intangible assets [Abstract]
Gross Amount				25,200	25,200
Accumulated Amortization				0	0
Carrying Amount		25,200		25,200	25,200
Technology [Member]
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance		16,011
Ending Balance		$ 15,589
Other intangible assets [Abstract]
Weighted Average Useful Lives		10 years 7 months 6 days
Gross Amount				41,072	39,169
Accumulated Amortization				25,483	23,158
Carrying Amount		$ 16,011		15,589	16,011
Customer relationships [Member]
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance		76,752
Ending Balance		$ 72,903
Other intangible assets [Abstract]
Weighted Average Useful Lives		16 years 9 months 18 days
Gross Amount				127,304	127,304
Accumulated Amortization				54,401	50,552
Carrying Amount		$ 72,903		72,903	76,752
Wheels [Member]
Goodwill by reportable segment [Roll Forward]
Balance as of December 31, 2014		96,283
Balance as of June 30, 2015		96,283
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance		115,465	122,764
Additions		0	671
Amortization		(5,992)	(5,971)
Ending Balance		109,473	117,464
Goodwill [Abstract]
Carrying Amount		96,283		96,283	96,283
Other intangible assets [Abstract]
Carrying Amount		115,465	122,764	109,473	115,465
Gunite [Member]
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance		0
Additions		1,903
Amortization		(56)
Ending Balance		1,847
Other intangible assets [Abstract]
Carrying Amount		0		1,847	0
Brillion Iron Works [Member]
Goodwill by reportable segment [Roll Forward]
Balance as of December 31, 2014		4,414
Balance as of June 30, 2015		4,414
Other intangible assets by reportable segment [Roll Forward]
Beginning Balance		2,498	2,666
Additions		0	0
Amortization		(126)	(126)
Ending Balance		2,372	2,540
Goodwill [Abstract]
Carrying Amount		4,414		4,414	4,414
Other intangible assets [Abstract]
Carrying Amount		$ 2,498	$ 2,666	$ 2,372	$ 2,498