Stockholders' Equity - Additional Information (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Stockholders Equity Note Disclosure [Line Items]
Common stock, shares authorized (in shares)	60,000,000		60,000,000		60,000,000
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01		$ 0.01
Common stock, shares issued (in shares)	30,219,278		30,219,278		30,219,278
Common stock, shares outstanding (in shares)	30,219,278		30,219,278		30,219,278
Preferred stock, shares authorized (in shares)	5,000,000		5,000,000		5,000,000
Preferred stock, par value (in dollars per share)	$ 0.01		$ 0.01		$ 0.01
Preferred stock, shares outstanding (in shares)	0		0		0
Restricted Stock
Stockholders Equity Note Disclosure [Line Items]
Antidilutive stock excluded from earning per share (in shares)	301,000	0	301,000	0