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Capital Stock - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Nov. 30, 2018
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Treasury stock, common (in shares) | 16,981,147 | 16,781,150 | 16,958,418 |
Preferred stock, shares authorized (in shares) | 1,000,000 |  |  |
Preferred stock, par or stated value per share (in dollars per share) | $ 0.01 |  |  |
Preferred stock, shares outstanding (in shares) | 0 | 0 | 0 |
Treasury stock, shares, acquired (in shares) | 419,114 | 153,151 | 381,041 |
Treasury shares purchased |  |  | $ 19,031,000 |
Treasury stock issued during period (in shares) | 219,117 | 330,419 | 1,491,408 |
Convertible Notes |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Face amount repurchased | $ 28,300,000 | $ 33,100,000 | $ 0 |
Cost of repurchase | $ 28,100,000 | $ 29,100,000 |  |
Share repurchase program |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Treasury stock, shares, acquired (in shares) | 0 | 0 | 2,537,833 |
Treasury shares purchased |  |  | $ 19,000,000 |
Stock repurchase program, authorized amount |  |  |  | $ 100,000,000
Stock repurchase program, remaining authorized repurchase amount | $ 23,800,000 |  |  |
Restricted Stock |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Treasury shares purchased | $ 1,400,000 | $ 300,000 | $ 2,700,000 |

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