Current and Noncurrent Accrued and Other Liabilities - Summary of Current and Noncurrent Accrued and Other Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Accrued warranty costs	$ 10,129	$ 9,596	$ 8,817	$ 8,169	$ 7,701	$ 7,297
Accrued payroll and benefits	9,090		8,743
Deferred revenue on extended warranty contracts	8,380		7,806
Accrued interest	5,686		13,888
Customer deposits	5,297		6,833
Other	25,598		23,013
Total current and noncurrent accrued liabilities	64,180		69,100
Less noncurrent portion	17,863		17,934
Current portion of accrued and other liabilities	46,317		51,166
Total current and noncurrent accrued liabilities	$ 64,180		$ 69,100