Significant Accounting Policies (Additional Information) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Line Items]
Percentage of foreign and export sales	44.20%	46.20%	45.20%
Export sales	$ 52,500	$ 57,600	$ 52,100
Percentage of sales to automotive market	56.60%	54.10%	68.50%
Progress billings adjustment	$ (316)	$ (1,108)
Finite-lived intangible asset useful life	10 years
Research and development expense	$ 8,500	$ 9,000	$ 7,600
Minimum
Accounting Policies [Line Items]
Finite-lived intangible asset useful life	4 years
Maximum
Accounting Policies [Line Items]
Finite-lived intangible asset useful life	14 years
Ford Motor Company
Accounting Policies [Line Items]
Percentage of accounts receivable from significant customer	13.20%
Percentage of foreign and export sales	18.20%	16.50%	20.00%
Chrysler Group Llc
Accounting Policies [Line Items]
Percentage of foreign and export sales			10.90%