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Stock-Based Compensation - Additional Information (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
May 24, 2021 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Mar. 31, 2020 | Sep. 30, 2024 | Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock options granted in period (in shares) |  |  |  |  |  |  | 0 |
Total intrinsic or aggregate value of options exercise price |  | $ 3,800,000 |  |  | $ 59,000 |  | $ 5,900,000 | $ 2,400,000
Total unrecognized compensation cost related to nonvested stock options granted |  | 572,000 |  |  |  |  | 572,000 |
Stock-based compensation |  |  |  |  |  |  | $ 3,360,000 | 2,814,000
Stock Option Awards |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation cost related to nonvested stock options/ RSA granted, weighted-average period |  |  |  |  |  |  | 3 years 1 month 6 days |
Stock-based compensation |  | 49,000 |  |  | 61,000 |  | $ 226,000 | 261,000
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Total unrecognized compensation cost related to nonvested stock options granted |  | 13,100,000 |  |  |  |  | $ 13,100,000 |
Unrecognized compensation cost related to nonvested stock options/ RSA granted, weighted-average period |  |  |  |  |  |  | 4 years 1 month 6 days |
Stock-based compensation |  | 846,000 |  |  | 735,000 |  | $ 2,700,000 | 2,200,000
Granted (in shares) |  |  |  |  |  |  | 183,580,000 |
Restricted Stock |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock options granted in period (in shares) |  |  |  |  |  |  | 0 |
Unrecognized compensation cost related to nonvested stock options/ RSA granted, weighted-average period |  |  |  |  |  |  | 3 years 3 months 18 days |
Stock-based compensation |  | 2,000 |  |  | 2,000 |  | $ 7,000 | $ 7,000
Total unrecognized compensation cost related to nonvested restricted stock awards |  | $ 30,000 |  |  |  |  | $ 30,000 |
2018 Omnibus Incentive Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate shares of common stock authorized (in shares) | 600,000 |  |  |  |  |  |  |
Shares available to be granted (in shares) |  | 249,028 |  |  |  |  | 249,028 |
Stock options granted in period (in shares) |  |  |  |  |  |  | 0 | 0
Total intrinsic or aggregate value of options exercise price |  |  |  |  |  |  | $ 7,120,000 |
2018 Omnibus Incentive Plan | Share-Based Payment Arrangement, Tranche One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting period |  | 3 years |  | 4 years |  |  |  |
2018 Omnibus Incentive Plan | Share-Based Payment Arrangement, Tranche Two |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting period |  | 5 years |  | 5 years |  |  |  |
2018 Omnibus Incentive Plan | Share-Based Payment Arrangement, Tranche Three |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting period |  | 43 months |  |  |  |  |  |
2018 Omnibus Incentive Plan | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  |  | 0 |  |  |  |  |
2018 Omnibus Incentive Plan | Restricted Stock Units (RSUs) | Share-Based Payment Arrangement, Tranche One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  | 572 |  | 76,473 |  |  |  |
Vesting percentage |  | 16.28% |  |  |  |  |  |
2018 Omnibus Incentive Plan | Restricted Stock Units (RSUs) | Share-Based Payment Arrangement, Tranche Two |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  | 3,361 |  | 3,174 |  |  |  |
Vesting percentage |  | 2.3256% |  |  |  |  |  |
2018 Omnibus Incentive Plan | Restricted Stock Units (RSUs) | Share-Based Payment Arrangement, Tranche Three |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  | 25,000 |  |  |  |  |  |
2018 Omnibus Incentive Plan | Restricted Stock | Director |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Market value of shares grants per year |  |  |  |  |  |  | 60,000 |
2018 Omnibus Incentive Plan | Restricted Stock | Board Chair |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Market value of shares grants per year |  |  |  |  |  |  | 90,000 |
2018 Omnibus Incentive Plan | Restricted Stock | Committee Chairs |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Market value of shares grants per year |  |  |  |  |  |  | 15,000 |
2018 Omnibus Incentive Plan | Restricted Stock | Non-Financial Risk and Compensation Committee Chair |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Market value of shares grants per year |  |  |  |  |  |  | 12,500 |
2018 Omnibus Incentive Plan | Restricted Stock | Asset Liability & Investment, Credit and Nominating & Governance Chair |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Market value of shares grants per year |  |  |  |  |  |  | $ 10,000 |
2018 Omnibus Incentive Plan | Performance Shares | Share-Based Payment Arrangement, Tranche One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  | 60,000 |  |  |  |  |  |
2018 Omnibus Incentive Plan | Performance Shares | Share-Based Payment Arrangement, Tranche Two |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  | 15,000 |  |  |  |  |  |
2006 Plan and the Directors' Stock Bonus Plan (2006 Plan) |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate shares of common stock authorized (in shares) |  |  |  |  |  | 0 |  |
Directors Stock Compensation Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation cost related to nonvested stock options/ RSA granted, weighted-average period |  |  |  |  |  |  | 8 months 12 days |
Directors Stock Compensation Plan | Restricted Stock |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock-based compensation |  | $ 184,000 |  |  | $ 120,000 |  | $ 442,000 | $ 312,000
Granted (in shares) |  |  |  |  |  |  | 16,698,000 |
Directors Stock Compensation Plan | Restricted Stock | Director |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Total unrecognized compensation cost related to nonvested stock options granted |  | $ 481,000 |  |  |  |  | $ 481,000 |
Maximum | 2018 Omnibus Incentive Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate shares of common stock authorized (in shares) |  |  |  |  |  | 500,000 |  |

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