Segment Reporting - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Segment	Dec. 31, 2013 Segment	Dec. 31, 2014 USD ($)
Segment Reporting [Abstract]
Number of reporting segments	3
Number of operating segments	3	3
Receivables from unconsolidated affiliates | $	$ 12,816		$ 20,061