Product Warranties (Tables)

6 Months Ended

Jun. 30, 2013

Guarantees [Abstract]

Summary of Changes in Product Warranties Reserve

The following table reflects the changes in the Company’s warranty reserve during the three and six months ended June 30, 2013 and 2012:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Warranty reserve, beginning of period	$	63,057		$	60,286		$	62,742		$	64,008
Provision		25,612			9,302			33,903			15,717
Payments		(11,328	)		(10,798	)		(19,304	)		(20,935	)
Warranty reserve, end of period	$	77,341		$	58,790		$	77,341		$	58,790