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Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 03, 2020 | Jul. 28, 2020 | Feb. 20, 2020 | Feb. 21, 2019 | Dec. 01, 2017 | May 18, 2017 | Jun. 02, 2016
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.01 |  |  |  |  | $ 0.01 |  | $ 0.01 |  |  |  |  |  |  |
Reduction to additional paid in capital |  | $ 46,133,000 | $ 82,866,000 | $ 51,053,000 | $ 50,311,000 |  |  |  |  |  |  |  |  |  |
Reduction in retained earnings | $ (1,659,947,000) |  |  |  |  | $ (1,659,947,000) |  | $ (1,506,271,000) |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) | 34,295 |  |  |  |  | 34,295 |  | 34,481 |  |  |  |  |  |  |
Additional Paid-in Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction to additional paid in capital |  | $ 3,047,000 | 82,859,000 | $ 51,048,000 | $ 50,306,000 | $ 3,000,000 |  |  |  |  |  |  |  |  |
2016 Stock Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program authorized amount | $ 900,000,000 |  |  |  |  | 900,000,000 |  |  |  |  |  |  |  |  | $ 100,000,000
Stock repurchase program additional amount authorized |  |  |  |  |  |  |  |  | $ 200,000,000 | $ 200,000,000 | $ 100,000,000 | $ 100,000,000 | $ 100,000,000 | $ 100,000,000 |
Available amount under repurchase program | 167,100,000 |  |  |  |  | 167,100,000 |  |  |  |  |  |  |  |  |
Reduction to additional paid in capital | 0 |  | $ 82,852,000 |  |  | 46,124,000 | $ 184,196,000 |  |  |  |  |  |  |  |
Reduction in retained earnings | $ 43,100,000 |  |  |  |  | $ 43,100,000 |  |  |  |  |  |  |  |  |

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