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Long-Term Incentive Compensation (Narrative) (Details) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
May 31, 2020 shares | May 31, 2019 shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | May 17, 2016 shares | Aug. 31, 2010 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  |  |  | 925,000
Stock based compensation expense | $ |  |  | $ 7,600,000 | $ 9,800,000 |  |
Total compensation cost not yet recognized | $ |  |  | $ 11,400,000 |  |  |
Total compensation cost not yet recognized, period for recognition |  |  | 2 years |  |  |
Intrinsic value of options exercised | $ |  |  | $ 0 | 0 |  |
Intrinsic value, options outstanding | $ |  |  | $ 0 | $ 0 |  |
Number of shares, granted (in shares) |  |  | 0 | 0 |  |
Maximum payout rate |  |  | 5 |  |  |
Employee Stock Option |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Option term |  |  | 10 years |  |  |
Award vesting period |  |  | 4 years |  |  |
Restricted Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average grant date fair value (in dollars per share) | $ / shares |  |  | $ 23.36 |  |  |
Fair value of shares vested | $ |  |  |  | $ 1,500,000 |  |
Vested in period (in shares) |  |  | 0 |  |  |
Granted (in shares) |  |  | 10,000 |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average grant date fair value (in dollars per share) | $ / shares |  |  | $ 18.20 | $ 12.83 |  |
Fair value of shares vested | $ |  |  | $ 5,300,000 | $ 10,300,000 |  |
Vested in period (in shares) |  |  | 113,000 |  |  |
Granted (in shares) |  |  | 140,000 |  |  |
Restricted Stock Units (RSUs) | Tranche One |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vested in period (in shares) |  |  | 73,839,000 |  |  |
Restricted Stock Units (RSUs) | Tranche Two |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vested in period (in shares) |  |  | 66,524,000 |  |  |
Vested in period, market price per share | $ / shares |  |  | $ 23.49 |  |  |
Trading days |  |  | 20 days |  |  |
Cash-Settled Phantom Stock Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 3 years |  |  |
Granted (in shares) |  |  | 66,524 |  |  |
Maximum payout rate |  |  | 5 |  |  |
Cash-Settled Contingent Phantom Stock Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 3 years |  |  |
Vested in period, market price per share | $ / shares |  |  | $ 23.49 |  |  |
Trading days |  |  | 20 days |  |  |
Granted (in shares) |  |  | 73,839 |  |  |
Stock Appreciation Rights |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Trading days |  |  | 20 days |  |  |
Granted (in shares) |  |  | 0 |  |  |
Fair value of the stock appreciation rights (in dollars per share) | $ / shares |  |  | $ 3.86 |  |  |
Stock option exercise price higher (in dollars per share) | $ / shares |  |  | 100.00 |  |  |
Right exercise price (in dollars per share) | $ / shares |  |  | $ 29.00 |  |  |
Minimum | Restricted Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 1 year |  |  |
Minimum | Restricted Stock Units (RSUs) |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 3 years |  |  |
Maximum | Restricted Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 4 years |  |  |
Maximum | Restricted Stock Units (RSUs) |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 4 years |  |  |
2016 Stock Incentive Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  |  | 285,000 |
Number of share additional (in shares) | 60,000 | 145,000 |  |  |  |
Number of shares available for grant (in shares) |  |  | 105,000 |  |  |

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