Restructuring - Additional Information (Details) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	May 02, 2016 facility	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Nov. 19, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		$ 1,500		$ 2,289	$ 1,487	$ 800
North America
Restructuring Cost and Reserve [Line Items]
Number of facilities | facility	2
Edgewood Wire Harness
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		0		300		100
Piedmont Seating
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		400		700		100
Employee Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred				1,721	37
Employee Costs | Edgewood Wire Harness
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		0		200		100
Employee Costs | Piedmont Seating
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred		$ 200		400		$ 100
Cost of Revenues
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred			$ 800	$ 2,300
Cost of Revenues | Closure of Tigard Facility
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs					$ 1,500
Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs							$ 8,000
Minimum | Capital Expenditures
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs							2,000
Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs							11,000
Maximum | Capital Expenditures
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs							$ 3,000