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Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Feb. 21, 2019 | Dec. 01, 2017 | May 18, 2017 | Jun. 02, 2016
Stockholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Value of shares retired | $ 48,332,000 | $ 21,883,000 |  | $ 14,220,000 |  |  |  |  |  |
2016 Stock Repurchase Program |  |  |  |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |
Stock repurchase program authorized amount |  |  |  |  |  |  | $ 400,000,000.0 |  |  | $ 100,000,000.0
Stock repurchase program additional amount authorized |  |  |  |  |  |  | $ 100,000,000.0 | $ 100,000,000.0 | $ 100,000,000.0 |
Available amount under repurchase program | $ 102,400,000 |  |  |  | $ 102,400,000 |  |  |  |  |
Shares of common stock repurchased and retired (in shares) | 580 |  | 0 |  | 908 | 337 |  |  |  |
Average price paid per share (in dollars per share) | $ 83.34 |  | $ 0 |  | $ 77.33 | $ 42.17 |  |  |  |
Value of shares retired | $ 48,320,000 |  | $ 0 |  | $ 70,197,000 | $ 14,213,000 |  |  |  |

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