Goodwill and Intangible Assets (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amortizable intangible assets
Gross amortizable intangible assets	$ 27,270,000	$ 17,942,000
Accumulated amortization	(8,281,000)	(6,793,000)
Amortizable intangible assets, net	18,989,000	11,149,000
Indefinite lived intangible assets	13,074,000	10,435,000
Intangible assets other than goodwill, net	32,063,000	21,584,000
Amortization expense related to amortizable intangible assets	1,500,000	800,000	800,000
Aggregated amortization expense on existing intangible assets for each of the next five years
2014	1,700,000
2015	1,700,000
2016	1,100,000
2017	1,100,000
2018	900,000
Assets associated with Bridgeport acquisition | Assets
Amortizable intangible assets
Indefinite lived intangible assets	7,354,000	7,595,000
Usach | Trade names
Amortizable intangible assets
Indefinite lived intangible assets	1,550,000	2,840,000
Forkardt | Trade names
Amortizable intangible assets
Indefinite lived intangible assets	4,170,000
Land rights
Amortizable intangible assets
Gross amortizable intangible assets	2,865,000	2,784,000
Accumulated amortization	(177,000)	(116,000)
Patents
Amortizable intangible assets
Gross amortizable intangible assets	3,030,000	3,006,000
Accumulated amortization	(2,884,000)	(2,807,000)
Technical know-how, customer list, and other
Amortizable intangible assets
Gross amortizable intangible assets	21,375,000	12,152,000
Accumulated amortization	$ (5,220,000)	$ (3,870,000)