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Stock-Based Compensation and Other Benefit Plans - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended | 60 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2021 | May 31, 2021 | May 31, 2015 | May 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options granted (in shares) |  | 0 |  |  | 0 |  |  |
Options exercised |  | 0 | 0 |  |  |  |  |
Value of options exercised |  |  |  | $ 1,600,000 |  |  |  |
Proceeds from options exercised |  |  |  | 1,300,000 |  |  |  |
Tax benefit from compensation expense |  | $ 0 | $ 0 | 1,300,000 |  |  |  |
Tax benefits from exercise of stock options |  |  |  | 300,000 |  |  |  |
Maximum annual contributions per employee (percent) |  | 50.00% |  |  |  |  |  |
Employer discretionary contribution amount |  | $ 2,200,000 | $ 1,200,000 | 4,300,000 |  |  |  |
Restricted Stock |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of performance-based restricted stock units issued, at target (in shares) |  | 210,367 |  |  |  |  |  |
Estimated fair value at date of grant (in dollars per share) |  | $ 3.28 |  |  |  |  |  |
Performance-based restricted stock units outstanding (in shares) |  | 235,367 | 181,886 |  | 235,367 |  |  |
Stock Options |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period |  | 3 years |  |  |  |  |  |
Expiration period |  | 10 years |  |  |  |  |  |
Restricted Stock Units and Restricted Stock Awards |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Tax benefit from compensation expense |  | $ 1,100,000 | $ 400,000 | 1,900,000 |  |  |  |
Allocated share-based compensation expense |  | 7,700,000 | 6,300,000 | 9,800,000 |  |  |  |
Restricted stock awards |  | $ 8,700,000 |  |  | $ 8,700,000 |  |  |
Period for recognition |  | 2 years |  |  |  |  |  |
Fair value of shares vested |  | $ 5,300,000 | 1,900,000 | 7,200,000 |  |  |  |
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] |  |  |  |  |  |  |  |
Number of performance-based restricted stock units issued, at target (in shares) |  |  |  |  | 0 |  |  |
Vesting period |  | 3 years |  |  |  |  |  |
Performance-based restricted stock units outstanding (in shares) |  | 0 |  |  | 0 |  |  |
Allocated share-based compensation expense |  | $ 0 | 0 | 100,000 |  |  |  |
Restricted stock awards |  | $ 5,700,000 | 4,000,000 |  | $ 5,700,000 |  |  |
The 2014 Director Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  |  |  | 1,200,000 |  | 1,000,000
Shares available for grant (in shares) |  | 146,527 |  |  | 146,527 |  |  |
The 2014 Director Plan | Employees, non-directors | Restricted Stock |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of performance-based restricted stock units issued, at target (in shares) |  | 210,367 |  |  |  |  |  |
Estimated fair value at date of grant (in dollars per share) |  | $ 3.28 |  |  |  |  |  |
The 2014 Director Plan | Employees, non-directors | Performance-based Restricted Stock Units |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Value of shares granted |  | $ 200,000 |  |  |  |  |  |
The 2015 Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares authorized (in shares) |  |  |  |  |  | 14,300,000 | 12,300,000 |
Shares available for grant (in shares) |  | 1,673,140 |  |  | 1,673,140 |  |  |
The 2015 Plan | Employees, non-directors |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Plan modification, expense recognized | $ 4,000,000 |  |  |  |  |  |  |
2021 Awards | Performance-based Restricted Stock Units |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period |  | 3 years |  |  |  |  |  |
Allocated share-based compensation expense |  | $ 3,000,000 | $ 2,600,000 | $ 2,300,000 |  |  |  |
2021 Awards | Time-based Restricted Stock Units |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Allocated share-based compensation expense |  | $ 1,400,000 |  |  |  |  |  |
Range of payout of shares for each executive, minimum |  | 0.00% |  |  |  |  |  |
Range of payout of shares for each executive, maximum |  | 200.00% |  |  |  |  |  |
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 |  | 3.00% |  |  |  |  |  |
Employer matching contribution, percent of match |  | 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% |  |  |  |  |  |
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 |  | 3.00% |  |  |  |  |  |
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% |  |  |  |  |  |

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