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Earnings Per Share - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Oct. 30, 2018 | Jul. 26, 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 | $ 500,000 | $ 250,000 |  |  |
Stock repurchased and retired during period, value | $ 500,000 | $ 250,000 |  |  |
Number of shares authorized to be repurchased (in shares) | 15,000,000 |  |  |  |
Shares available for repurchase (in shares) | 7,993,299 |  |  |  |
Subsequent Event |  |  |  |  |
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Cash dividend, amount per share (in dollars per share) |  |  | $ 0.335 |  |
May 2018 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) | 2,680,704 |  |  |  |
August 2018 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) | 1,984,914 |  |  |  |
Stock repurchased and retired during period, value | $ 200,000 |  |  |  |
Accelerated Share Repurchase Agreement |  |  |  |  |
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Repurchase of common stock shares (in shares) | 4,665,618 |  |  |  |

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