Stockholders Equity - Additional Information (Detail) - $ / shares			3 Months Ended
	Mar. 11, 2019	Feb. 14, 2019	Mar. 31, 2019	Mar. 31, 2018
Equity [Abstract]
Common stock dividend paid per share	$ 0.07			$ 0.07
Common stock dividend per share declared		$ 0.07		$ 0.07
Dividend payable, date declared			Feb. 14, 2019
Dividend payable, date paid			Mar. 11, 2019