Earnings Per Share - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jul. 26, 2018	May 08, 2018	Feb. 23, 2018
Earnings Per Share Disclosure [Line Items]
Increase in dividend rate, percentage						5.00%
Cash dividend, amount per share (in dollars per share)					$ 0.335	$ 0.335
Payment for repurchase of common stock		$ 250,000	$ 250,000
Stock repurchased and retired during period, value		$ 250,000	$ 250,000
Number of shares authorized to be repurchased (in shares)	15,000,000	15,000,000
Shares available for repurchase (in shares)	10,304,784	10,304,784
Subsequent Event
Earnings Per Share Disclosure [Line Items]
Cash dividend, amount per share (in dollars per share)				$ 0.335
Accelerated Share Repurchase Agreement
Earnings Per Share Disclosure [Line Items]
Payment for repurchase of common stock	$ 250,000
Repurchase of common stock shares (in shares)	2,354,133
Stock repurchased and retired during period, value	$ 230,000