Long-Term Cash Incentive Plan - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Performance period (years)	3 years
Long term incentive plan compensation	$ (3,852)	$ 657
Long Term Incentive Plan 2016
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Estimated payments for employee long term incentive plan	5,600
Long term incentive plan compensation	$ 1,000