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Stockholders' Equity - Dividends (Details) - USD ($) |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |
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Nov. 02, 2021 | Oct. 26, 2021 | Aug. 27, 2021 | Aug. 03, 2021 | Jul. 21, 2021 | Jun. 29, 2021 | May 31, 2021 | May 03, 2021 | Mar. 22, 2021 | Feb. 24, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Jul. 12, 2021 | Mar. 31, 2021
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends to shareholders (in usd per share) |  |  |  | $ 0.375 |  |  |  | $ 0.375 |  | $ 0.375 |  |  |  |  |  |
Dividends paid |  |  | $ 7,500,000 |  | $ 80,000,000 |  | $ 7,500,000 |  | $ 7,500,000 |  |  |  | $ 102,123,000 | $ 0 |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000
Repurchase of common stock (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 190,783 |  |  |
Treasury stock, acquired, average cost (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 76.30 |  |  |
Treasury stock, value acquired |  |  |  |  |  |  |  |  |  |  |  | $ 14,560,000 | $ 14,600,000 |  |  |
Warrants outstanding (in shares) |  |  |  |  |  |  |  |  |  |  | 1,615,555 |  | 1,615,555 |  |  |
Warrants exercised (in shares) |  |  |  |  |  |  |  |  |  |  | 2,791 |  | 6,050 |  |  |
Exercise price of warrants or rights (in usd per share) |  |  |  |  |  |  |  |  |  |  | $ 94.57 |  | $ 94.57 |  | $ 90.57 |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends to shareholders (in usd per share) |  | $ 0.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock (in shares) | 156,519 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury stock, acquired, average cost (in dollars per share) | $ 121.22 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury stock, value acquired | $ 19,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Special Cash Dividend |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends to shareholders (in usd per share) |  |  |  |  |  | $ 4.00 |  |  |  |  |  | $ 4.00 |  |  |  |

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