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Stockholders' Equity - Schedule of Stock Repurchases (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Stockholders Equity [Line Items] |  |  |  |  |  |
Total cost | $ 51,053 | $ 50,311 | $ 48,332 | $ 21,883 |  |
2016 Stock Repurchase Program |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |
Shares of common stock repurchased and retired (in shares) | 471 |  | 580 |  | 921 | 908
Average price paid per share (in dollars per share) | $ 108.41 |  | $ 83.34 |  | $ 110.03 | $ 77.33
Total cost | $ 51,043 |  | $ 48,320 |  | $ 101,344 | $ 70,197

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