Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Product revenues	$ 258,939	$ 235,853	$ 784,607	$ 728,498
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 12,898	$ 11,472	$ 38,721	$ 32,663
Restructuring expenses	5,818		12,898
Operating income (loss)	15,713	16,134	51,955	76,110
Automotive Segments
Segment Reporting Information [Line Items]
Restructuring expenses	4,332		7,578
Industrial Segments
Segment Reporting Information [Line Items]
Restructuring expenses	1,486		5,320
Operating Segments | Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	$ 236,576	$ 215,175	$ 717,655	$ 652,820
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 11,060	$ 9,423	$ 32,839	$ 26,602
Restructuring expenses	4,332		7,578
Operating income (loss)	38,023	37,142	116,427	127,885
Operating Segments | Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	$ 22,363	$ 20,678	$ 66,952	$ 75,678
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 1,170	$ 1,334	$ 3,822	$ 4,040
Restructuring expenses	1,486		5,320
Operating income (loss)	$ (4,449)	$ (5,613)	$ (19,010)	$ (10,747)
Reconciling Items
Segment Reporting Information [Line Items]
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 668	$ 715	$ 2,060	$ 2,021
Operating income (loss)	$ (17,861)	$ (15,395)	$ (45,462)	$ (41,028)