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Incentive Plan - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares, assumed in acquisition (in shares) | 0 | 0 | 491,248
Weighted average exercise price, assumed in acquisition (in dollars per share) | $ 0 | $ 0 | $ 21.92
Compensation cost related to non-vested awards not yet recognized | $ 12,500 |  |
Aggregate intrinsic value for stock options outstanding | 3,500 |  |
Aggregate intrinsic value for stock options exercisable | $ 3,400 |  |
Equity Option |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock incentive plan vesting rate (percent) | 20.00% |  |
Award vesting period (years) | 3 years |  |
Stock incentive plan expiration period (years) | 10 years |  |
Expense for stock option grants | $ 1,500 | $ 973 | $ 1,000
Vesting period of compensation cost related to non-vested awards | 3 years 3 months |  |
Stock Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expense for stock option grants | $ 2,800 | $ 2,900 | $ 2,000
Employee Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting period (years) | 5 years |  |
2020 Stock Incentive Plan | Equity Option |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock incentive plan, number of additional shares authorized (in shares) | 2,000,000 |  |
Stock incentive plan remaining options or awards (in shares) | 969,294 |  |
2020 Stock Incentive Plan | Stock Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock incentive plan, number of additional shares authorized (in shares) | 800,000 |  |
Stock incentive plan remaining options or awards (in shares) | 387,718 |  |
2011 Stock Incentive Plan | Equity Option |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock incentive plan, number of additional shares authorized (in shares) | 4,000,000 |  |
Stock incentive plan remaining options or awards (in shares) | 47,690 |  |
2011 Stock Incentive Plan | Stock Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock incentive plan, number of additional shares authorized (in shares) | 1,600,000 |  |
Stock incentive plan remaining options or awards (in shares) | 19,076 |  |
Tranche One | Equity Option |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock incentive plan vesting rate (percent) | 20.00% |  |
Sun Bancorp, Inc. |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares, assumed in acquisition (in shares) |  |  | 491,248
Weighted average exercise price, assumed in acquisition (in dollars per share) |  |  | $ 21.92

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