Summary Composition by Product Category of Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue from External Customer [Line Items]
Revenues	$ 184,692	$ 202,729	$ 217,617	$ 220,303	$ 211,874	$ 213,802	$ 215,996	$ 198,071	$ 825,341	$ 839,743	$ 747,718
Percent of net revenues (as a percent)									100.00%	100.00%	100.00%
Seats and seating systems
Revenue from External Customer [Line Items]
Revenues									$ 339,724	$ 351,621	$ 314,440
Percent of net revenues (as a percent)									41.00%	42.00%	42.00%
Trim systems and components
Revenue from External Customer [Line Items]
Revenues									$ 179,713	$ 163,399	$ 150,605
Percent of net revenues (as a percent)									22.00%	19.00%	20.00%
Electronic wire harnesses and panel assemblies
Revenue from External Customer [Line Items]
Revenues									$ 154,417	$ 180,237	$ 152,947
Percent of net revenues (as a percent)									19.00%	21.00%	21.00%
Cab structures, sleeper boxes, body panels and structural components
Revenue from External Customer [Line Items]
Revenues									$ 96,046	$ 89,168	$ 74,219
Percent of net revenues (as a percent)									12.00%	11.00%	10.00%
Mirrors, wipers and controls
Revenue from External Customer [Line Items]
Revenues									$ 55,441	$ 55,318	$ 55,507
Percent of net revenues (as a percent)									6.00%	7.00%	7.00%