Warranty Reserve (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2014

Dec. 31, 2013

Warranty Reserve [Abstract]

Schedule of Changes in Warranty Accrual

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2014		2013		2014		2013
Accrued warranty reserve, beginning of period	$	1,546	$	845	$	1,150	$	679
Warranty reserves assumed in business combinations		200		—		341		—
Warranty expense provisions		715		195		1,354		582
Payments		(347)		(204)		(731)		(425)
Accrued warranty reserve, end of period	$	2,114	$	836	$	2,114	$	836

	Year Ended December 31,
	2013		2012
Beginning balance	$	679	$	474
Warranty expense provisions		1,112		630
Payments		(641)		(425)
Ending balance	$	1,150	$	679