Product Warranties (Tables)

6 Months Ended

Jun. 30, 2015

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, 2015 and 2014:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
Warranty reserve, beginning of period	$	89,743		$	98,765		$	94,060		$	101,507
Provision		11,144			13,193			20,226			23,453
Payments		(15,013	)		(14,768	)		(28,412	)		(27,770	)
Warranty reserve, end of period	$	85,874		$	97,190		$	85,874		$	97,190