Interim Financial Data (Unaudited) - Summary of Interim Financial Data (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Data [Abstract]
Increase in warranty reserve		$ 20,000	$ 20,000	$ 20,000	$ 21,487
Provision (benefit) for income taxes	$ 10,900			$ (10,549)	$ 1,009	$ (2,605)