Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair value of fixed-rate debt	$ 254,200,000	$ 254,200,000
Debt issuance costs	248,800,000	248,800,000
Amount of interest rate swap	$ 150,000,000	$ 150,000,000
Description of term of interest rate swap		Our $150.0 million interest rate swap went into effect on December 29, 2015, at which time our interest rate was effectively 6.966% until December 31, 2018.
Locked interest rate	6.966%	6.966%
Derivative maturity date		Dec. 31, 2018
Derivative inception date		Dec. 29, 2015
Derivative in Net liability position	$ 4,100,000	$ 4,100,000
Loss in accumulated other comprehensive income		(4,096,000)	$ (3,015,000)
Net hedging losses on the interest rate swaps	(500,000)	(927,000)
Amount to be reclassified from accumulated and other comprehensive income in next twelve months	$ 1,800,000	$ 1,800,000