Earnings Per Share - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Nov. 30, 2016
Earnings Per Share Disclosure [Line Items]
Preferred stock, shares authorized (in shares)	15,000,000
Preferred stock, shares issued (in shares)	0
Payment for repurchase of common stock	$ 0	$ 0	$ 150,000
Shares available for repurchase	15,000,000
Common Stock
Earnings Per Share Disclosure [Line Items]
Shares repurchased (in shares)	0	0
Accelerated Share Repurchase Agreement
Earnings Per Share Disclosure [Line Items]
Shares repurchased (in shares)			2,190,254
Payment for repurchase of common stock			$ 150,000
Maximum
Earnings Per Share Disclosure [Line Items]
Stock repurchase program, number of shares authorized to be repurchased (in shares)				15,000,000
Restricted Stock
Earnings Per Share Disclosure [Line Items]
Number of shares containing nonforfeitable rights to dividends (in shares)	6,000