Commitments and Contingencies - Summary of Reconciliation of Company's Warranty Reserve that Represents Amounts Accrued for Surface Flaking Claims (Detail) - Surface Flaking Warranty Reserve [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Product Warranty Liability [Line Items]
Beginning balance		$ 29,673	$ 31,419
Changes in estimates related to pre-existing warranties	$ 9,800	9,835	5,426
Settlements made during the period		(5,661)	(7,172)
Ending balance		$ 33,847	$ 29,673