Hedge Contracts (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Derivative [Line Items]
Traded exchange rate		20.18
Net losses associated with foreign currency derivative program	$ (1,300)	$ 2,000	$ 600
Derivatives [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 5.75
Warranty Liability	$ 13,202	18,503
Fair Value Adjustment of Warrants	(5,301)	2,106	$ 0
Forward sale contracts		(81)
Total derivatives designated as hedging instruments	(127)	(290)
Forward Sale Contract, Mexican Pesos [Member]
Derivative [Line Items]
U.S. Dollar notional amount	$ 6,067	$ 2,483
Traded exchange rate	19.28
Value date	Jan. 18, 2018	Jan. 18, 2017
Forward Purchase Contract, Mexican Pesos [Member]
Derivative [Line Items]
U.S. Dollar notional amount	$ 6,974	$ 6,740
Traded exchange rate	19.28	20.18
Value date	Jan. 18, 2018	Jan. 18, 2017
Forward Purchase Contract, Euros [Member]
Derivative [Line Items]
U.S. Dollar notional amount	$ 1,743	$ 509
Traded exchange rate	1.19	1.07
Value date	Jan. 18, 2018	Jan. 18, 2017
Forward Purchase Contract, Pounds Sterling [Member]
Derivative [Line Items]
U.S. Dollar notional amount	$ 5,998	$ 6,258
Traded exchange rate	1.33	1.28
Value date	Jan. 18, 2018	Jan. 18, 2017
Forward sale contract, Canadian Dollar [Member]
Derivative [Line Items]
U.S. Dollar notional amount	$ 3,756
Traded exchange rate	1.29
Value date	Jan. 18, 2018
Forward Purchase Contract, Saudi Arabia riyal [Member]
Derivative [Line Items]
U.S. Dollar notional amount	$ 4,131	$ 2,322
Traded exchange rate	8.40	8.53
Value date	Jan. 18, 2018	Jan. 18, 2017
Current Assets [Member]
Derivatives [Line Items]
Forward purchase contracts	$ (111)	$ 0
Forward sale contracts	(130)
Current Liabilities [Member]
Derivatives [Line Items]
Forward purchase contracts	$ (113)	$ (371)