Stockholders' Equity and Earnings Per Share ("EPS") - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Stockholders Equity Note [Line Items]
Proceeds from issuance of common stock	$ 0	$ 0	$ 434,866
Common stock
Stockholders Equity Note [Line Items]
Common stock issued in public offering (in shares)			4,485,000