Equity-Based Compensation - SARs Additional Information (Detail) - SARs - USD ($) $ / shares in Units, $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of SARs exercisable (in shares)	287,094	477,791
SARs exercisable weighted average price (in dollars per share)	$ 11.42	$ 10.61
Number of SARs expected to vest (in shares)	19,481
Aggregate intrinsic value of SARs outstanding	$ 859	$ 100