Related Party - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Payment due to termination of agreement			$ 24.0
Fees for services and expenses	$ 0.1	$ 0.1	25.3
Beneficial Owner [Member]
Related Party Transaction [Line Items]
Percentage of common stock by partners	20.00%
Related party lease expense	$ 0.1	$ 0.4	$ 0.4