Nature of Business and Summary of Significant Accounting Policies - Summary of Warranty Expense and Write-Off Activity (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Balance at beginning of period	$ 9,653	$ 4,118
Plus: Amounts charged to cost and expenses	4,051	5,363
Amounts assumed on acquisition		3,781
Less: Deductions	(4,727)	(3,609)
Balance at end of period	$ 8,977	$ 9,653