Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 15, 2016	Dec. 31, 2018	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
Preferred Stock, Shares Authorized			10,000,000	10,000,000
Common stock, shares authorized (shares)			100,000,000	100,000,000
Common stock, par value (usd per share)		$ 0.01	$ 0.01	$ 0.01
Common stock, shares outstanding (shares)			20,363,198	20,217,641
Common stock, shares issued (shares)			20,363,198	20,217,641
Restricted common stock, shares repurchased (shares)	0	1,614,047	48,403	56,328
Restricted common stock, aggregate cost	$ 0.0	$ 0.2	$ 0.3	$ 0.7