Preproduction Costs Related to Long-Term Supply Arrangements - Summary of Unamortized Customer-Owned Tooling Costs Included in Non-current Assets and Deferred Tooling Revenues Included in Accrued Expenses and Other Non-current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Customer-Owned Tooling Costs
Preproduction costs	$ 92,232	$ 84,198
Accumulated amortization	(73,722)	(71,409)
Net preproduction costs	18,510	12,789
Deferred Tooling Revenues
Accrued expenses	5,450	4,654
Other non-current liabilities	5,638	1,974
Total deferred tooling revenues	$ 11,088	$ 6,628