| **Capital Stock - Narrative (Details) - USD ($)**                     | 12 Months Ended |              |             |              |
|-----------------------------------------------------------------------|-----------------|--------------|-------------|--------------|
||
| **Equity, Class of Treasury Stock [Line Items]**                      |            |         |        |         |   |   |
| Treasury stock, common (in shares)                                    | 26,471,738      | 21,751,232   | 16,981,147  |         |   | 16,781,000 |
| Treasury shares purchased at cost                                     | $ 32,185,000    | $ 17,618,000 |        |         |   |   |
| Treasury stock, shares, acquired (in shares)                          | 6,523,000       | 4,438,000    | 0           |         |   |   |
| 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           |         |   |   |
| Share repurchase program                                              |            |         |        |         |   |   |
| **Equity, Class of Treasury Stock [Line Items]**                      |            |         |        |         |   |   |
| Treasury shares purchased at cost                                     | $ 31,900,000    | $ 17,500,000 |        |         |   |   |
| Stock repurchase program, authorized amount                           |            |         |        |         | $ 50,000,000 |   |
| Treasury stock, shares, acquired (in shares)                          | 6,522,797       | 4,437,885    |        |         |   |   |
| Stock repurchase program, remaining authorized repurchase amount      | $ 18,100,000    |         |        |         |   |   |
| Share repurchase program | Subsequent Event                           |            |         |        |         |   |   |
| **Equity, Class of Treasury Stock [Line Items]**                      |            |         |        |         |   |   |
| Stock repurchase program, authorized amount                           |            |         |        | $ 50,000,000 |   |   |
| Restricted Stock                                                      |            |         |        |         |   |   |
| **Equity, Class of Treasury Stock [Line Items]**                      |            |         |        |         |   |   |
| Treasury shares purchased at cost                                     | $ 2,200,000     | $ 2,700,000  | $ 1,400,000 |         |   |   |

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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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| - Definition
Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.
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Amount of stock repurchase plan authorized.
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Amount remaining of a stock repurchase plan authorized.
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Number of previously issued common shares repurchased by the issuing entity and held in treasury.
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| - Definition
Number of shares that have been repurchased during the period and are being held in treasury.
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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.
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