Fair Value Measurements and Assets Held for Sale - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Fair Value Measurement and Assets Held-for-sale [Abstract]
Impairment charge of asset held for sale	$ 600	$ 6,600	$ 3,200
Fair value of assets held for sale			$ 10,300		$ 10,300		$ 13,500
Reclassification of assets held for sale to inventory		$ 3,700		$ 3,727	0	$ 0
Impairment charge					$ 3,200