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Stockholders' Equity - Additional Information (Details) - USD ($) |  | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 16, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 03, 2020 | Jul. 28, 2020 | Feb. 20, 2020 | Feb. 21, 2019 | Aug. 13, 2018 | Dec. 01, 2017 | May 18, 2017 | Jun. 02, 2016
Stockholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) |  | $ 0.01 | $ 0.01 |  |  |  |  |  |  |  |  |
Reduction to additional paid in capital |  | $ (353,451,000) | $ (105,941,000) | $ (55,738,000) |  |  |  |  |  |  |  |
Additional paid-in capital |  | 0 | 216,162,000 |  |  |  |  |  |  |  |  |
Reduction to retained earnings |  | $ (1,506,271,000) | $ (1,413,453,000) |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) |  | 34,481,000 | 37,390,000 |  |  |  |  |  |  |  |  |
2016 Stock Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase program authorized amount |  |  |  |  |  | $ 900,000,000.0 |  |  |  |  |  | $ 100,000,000.0
Stock repurchase program additional amount authorized |  |  |  |  | $ 200,000,000.0 | $ 200,000,000.0 | $ 100,000,000.0 | $ 100,000,000.0 |  | $ 100,000,000.0 | $ 100,000,000.0 |
Available amount under repurchase program |  | $ 213,200,000 |  |  |  |  |  |  |  |  |  |
Reduction to additional paid in capital |  | (353,385,000) | $ (105,915,000) | $ (40,722,000) |  |  |  |  |  |  |  |
Reduction to retained earnings |  | $ 117,864,000 |  |  |  |  |  |  |  |  |  |
Shares of common stock repurchased and retired (in shares) |  | 3,269,000 | 1,258,000 | 756,000 |  |  |  |  |  |  |  |
Average price paid per share (in dollars per share) |  | $ 108.11 | $ 84.16 | $ 53.88 |  |  |  |  |  |  |  |
2018 Stock Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase program authorized amount |  |  |  |  |  |  |  |  | $ 25,000,000.0 |  |  |
Reduction to additional paid in capital | $ (15,000,000.0) |  |  |  |  |  |  |  |  |  |  |
Shares of common stock repurchased and retired (in shares) | 196,050 |  |  |  |  |  |  |  |  |  |  |
Average price paid per share (in dollars per share) | $ 76.51 |  |  |  |  |  |  |  |  |  |  |

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