Derivative Instruments - Effect of Derivatives Instruments on Combined Statements of Operations and Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Deferred losses from derivatives in OCI, beginning of period	$ (134)	$ (79)	$ (182)
Loss recognized in OCI from derivative instruments	0	(65)	(82)
Loss reclassified from Accumulated OCI	53	10	185
Deferred losses from derivatives in OCI, end of period	$ (81)	$ (134)	$ (79)