| **Stock-Based Compensation and Other Benefit Plans - Narrative (Details) - USD ($)** |         | 12 Months Ended         | 84 Months Ended |             |             |
|--------------------------------------------------------------------------------------|---------|-------------------------|-----------------|-------------|-------------|
||
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Options granted (in shares)                                                          |    | 0                       |            |        | 0           |   |   |
| Intrinsic value of options exercised                                                 |    | $ 400,000               |            |        |        |   |   |
| Proceeds from options exercised                                                      |    | 600,000                 |            |        |        |   |   |
| Tax benefits from exercise of stock options                                          |    | 100,000                 |            |        |        |   |   |
| Share-based compensation expense                                                     |    | $ 0                     | $ 0             |        |        |   |   |
| Options exercised (in shares)                                                        |    | 140,460                 | 0               | 0           |        |   |   |
| Maximum annual contributions per employee (percent)                                  |    | 50.00%                  |            |        |        |   |   |
| Employer discretionary contribution amount                                           |    | $ 3,200,000             | $ 2,500,000     | $ 2,200,000 |        |   |   |
| Stock Options                                                                        |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Vesting period                                                                       |    | 3 years                 |            |        |        |   |   |
| Expiration period                                                                    |    | 10 years                |            |        |        |   |   |
| Share-based compensation expense                                                     |    |                    |            | 0           |        |   |   |
| Restricted Stock Units and Restricted Stock Awards                                   |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Share-based compensation expense                                                     |    | $ 6,400,000             | 6,700,000       | 7,700,000   |        |   |   |
| Restricted stock awards                                                              |    | $ 8,800,000             |            |        | $ 8,800,000 |   |   |
| Period for recognition                                                               |    | 1 year 9 months 18 days |            |        |        |   |   |
| Fair value of shares vested                                                          |    | $ 8,000,000             | 9,400,000       | 5,300,000   |        |   |   |
| Tax benefit from compensation expense                                                |    | $ 1,800,000             | 1,800,000       | 1,100,000   |        |   |   |
| Restricted Stock Units and Restricted Stock Awards | Minimum                         |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Vesting period                                                                       |    | 3 years                 |            |        |        |   |   |
| Restricted Stock Units and Restricted Stock Awards | Maximum                         |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Vesting period                                                                       |    | 4 years                 |            |        |        |   |   |
| Performance-based Restricted Stock Units                                             |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Vesting period                                                                       |    | 3 years                 |            |        |        |   |   |
| Share-based compensation expense                                                     |    | $ 3,800,000             | 3,400,000       | 3,900,000   |        |   |   |
| Restricted stock awards                                                              |    | 6,700,000               | 6,500,000       |        | $ 6,700,000 |   |   |
| Share based payment arrangement settlement based on total shareholder return         |    | 1,800,000               |            |        |        |   |   |
| Return on net capital employed                                                       |    | $ 700,000               |            |        |        |   |   |
| The 2014 Director Plan                                                               |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Number of shares authorized (in shares)                                              |    |                    |            |        |        | 2,000,000 | 1,400,000 |
| Shares available for grant (in shares)                                               |    | 500,000                 |            |        | 500,000     |   |   |
| The 2015 Plan                                                                        |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Number of shares authorized (in shares)                                              |    |                    |            |        |        | 16,500,000 | 15,300,000 |
| Shares available for grant (in shares)                                               |    | 2,500,000               |            |        | 2,500,000   |   |   |
| 2023 Awards | Performance-based Restricted Stock Units                               |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Vesting period                                                                       |    | 3 years                 |            |        |        |   |   |
| Share-based compensation expense                                                     |    | $ 2,500,000             |            |        |        |   |   |
| 2022 Awards | Performance-based Restricted Stock Units                               |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Vesting period                                                                       |    | 3 years                 |            |        |        |   |   |
| Share-based compensation expense                                                     |    |                    | $ 2,800,000     |        |        |   |   |
| 2022 Awards | Time-based Restricted Stock Units                                      |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Range of payout of shares for each executive, minimum                                |    | 0.00%                   |            |        |        |   |   |
| Range of payout of shares for each executive, maximum                                |    | 200.00%                 |            |        |        |   |   |
| 2021 Awards | Performance-based Restricted Stock Units                               |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Vesting period                                                                       |    | 3 years                 |            |        |        |   |   |
| Share-based compensation expense                                                     |    |                    |            | 3,000,000   |        |   |   |
| 2021 Awards | Time-based Restricted Stock Units                                      |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Share-based compensation expense                                                     |    |                    |            | $ 1,400,000 |        |   |   |
| Participants Contributions Up to 3 Percent of Compensation                           |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Employer matching contribution, percent of employees' gross pay                      | 4.00%   | 4.00%                   |            |        |        |   |   |
| Employer matching contribution, percent of match                                     | 100.00% | 100.00%                 |            |        |        |   |   |
| Participants Contributions from 3 Percent to 6 Percent of Compensation               |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Employer matching contribution, percent of match                                     | 50.00%  | 50.00%                  |            |        |        |   |   |
| Participants Contributions from 3 Percent to 6 Percent of Compensation | Minimum     |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Employer matching contribution, percent of employees' gross pay                      | 4.00%   | 5.00%                   |            |        |        |   |   |
| Participants Contributions from 3 Percent to 6 Percent of Compensation | Maximum     |    |                    |            |        |        |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**   |    |                    |            |        |        |   |   |
| Employer matching contribution, percent of employees' gross pay                      | 6.00%   | 6.00%                   |            |        |        |   |   |

| X                                                                                                                                                                                                                                                                                                                                                                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share Based Compensation Arrangement by Share Based Payment Award, Percentage of Outstanding Stock Minimum
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| X                                                                                                                                                                                                                                                                                                        |
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| - Definition
Share-Based Payment Arrangement, Return on Net Capital Employed
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| - Definition
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.
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| - Definition
Amount of discretionary contributions made by an employer to a defined contribution plan.
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| - Definition
Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.
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Percentage employer matches of the employee's percentage contribution matched.
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| - Definition
Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
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| - Definition
Amount of cost not yet recognized for nonvested award under share-based payment arrangement.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.
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| - Definition
Amount of tax benefit for recognition of expense of award under share-based payment arrangement.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of tax benefit from exercise of option under share-based payment arrangement.
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| - Definition
Amount of cash inflow from exercise of option under share-based payment arrangement.
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| - Definition
Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.
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| - Definition
Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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| - Definition
Number of shares authorized for issuance under share-based payment arrangement.
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| - Definition
The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.
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| - Definition
Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.
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| - Definition
Gross number of share options (or share units) granted during the period.
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| - Definition
Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.
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| - Definition
Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
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| - Definition
Number of share options (or share units) exercised during the current period.
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