Stock-Based Compensation - Short-term Incentive Plan - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued under short-term incentive plan, value	$ 729
Short-Term Incentive Plan (STIP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued under short-term incentive plan, shares | shares	112,916
Stock issued under short-term incentive plan, value	$ 600