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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 |  |  |  |  |

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