Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 28, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Class of Stock [Line Items]
Issuance of common stock, net, shares	9,780
Proceeds from the issuance of common stock, net	$ 105,800				$ 105,889	$ 0
Share price to the public (in usd per share)	$ 11.35
Dividends declared per common share (in usd per share)		$ 0.17	$ 0.17	$ 0.16	$ 0.34	$ 0.32	$ 0.64
Dividend, payable date			Apr. 15, 2016
Dividend, record date			Mar. 31, 2016
Over-Allotment Option [Member]
Class of Stock [Line Items]
Issuance of common stock, net, shares	1,280