Accrued Expenses and Other Liabilities - Summary of Changes in Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of changes in warranty reserves
Reserve — beginning of period	$ 43,098	$ 44,595	$ 34,814
Additions to reserves	26,571	19,681	16,882
Costs and claims incurred	(21,379)	(26,506)	(6,799)
Change in estimates to pre-existing reserves	2,260	5,328	(302)
Reserve — end of period	$ 50,550	$ 43,098	$ 44,595