Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Product revenues	$ 215,714	$ 206,909
Depreciation and amortization	8,164	7,459
Operating income (loss)	29,885	27,077
Operating Segments | Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	210,435	199,443
Depreciation and amortization	7,283	6,316
Operating income (loss)	42,701	40,682
Operating Segments | Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	5,279	7,466
Depreciation and amortization	390	489
Operating income (loss)	(2,616)	(1,287)
Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and amortization	491	654
Operating income (loss)	$ (10,200)	$ (12,318)