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v3.23.3

Stock-Based Compensation Plans (Details) $ / shares in Units, $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2023 USD ($) Type $ / shares shares | Sep. 30, 2022 USD ($)
Restricted and Performance Stock Grants [Abstract] |  |
Number of types of restricted stock | Type | 2 |
Additional Disclosures [Abstract] |  |
Compensation expense, gross | $ | $ 5,243 | $ 6,327
Restricted Shares [Member] | Minimum [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Expiration of vesting period | 3 years |
Restricted Shares [Member] | Employees [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Estimated forfeitures | 5.00% |
Restricted Shares [Member] | Executives [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Estimated forfeitures | 0.00% |
Restricted Shares [Member] | Directors [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Estimated forfeitures | 0.00% |
Restricted Shares [Member] | Age 60 [Member] | Executives [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Vesting percentage | 25.00% |
Vesting period before reaching age limit | 2 months |
Restricted Shares [Member] | Age 63 [Member] | Executives [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Vesting percentage | 25.00% |
Vesting period before reaching age limit | 2 months |
Restricted Shares [Member] | Age 65 [Member] | Executives [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Vesting percentage | 100.00% |
Vesting period before reaching age limit | 2 months |
Performance-based Shares [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Measuring period for performance-based shares | 3 years |
Performance-based Shares [Member] | Minimum [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Expiration of vesting period | 3 years |
Restricted and Performance-Based Shares [Member] |  |
Restricted and performance-based stock, shares [Roll Forward] |  |
Beginning of period (in shares) | 880,829 |
Granted (in shares) | 6,000 |
Vested (in shares) | (58,978) |
Forfeited (in shares) | (5,200) |
End of period (in shares) | 822,651 |
Restricted and performance-based stock, weighted average grant date fair value per share [Roll Forward] |  |
Beginning of period (in dollars per share) | $ / shares | $ 31.79 |
Granted (in dollars per share) | $ / shares | 31.63 |
Vested (in dollars per share) | $ / shares | 32.49 |
Forfeited (in dollars per share) | $ / shares | 36.63 |
End of period (in dollars per share) | $ / shares | $ 31.74 |
Additional Disclosures [Abstract] |  |
Compensation expense, gross | $ | $ 4,900 | 5,700
Compensation expense, net of tax | $ | 3,700 | $ 4,200
Unamortized compensation expense | $ | $ 9,600 |
Restricted and Performance-Based Shares [Member] | Employees [Member] |  |
Additional Disclosures [Abstract] |  |
Weighted average period of recognition for unrecognized compensation expense | 3 years 9 months 14 days |
Restricted and Performance-Based Shares [Member] | Directors [Member] |  |
Additional Disclosures [Abstract] |  |
Weighted average period of recognition for unrecognized compensation expense | 6 months 29 days |
Restricted and Performance-Based Shares [Member] | Executives and Directors [Member] | Minimum [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Holding period for restricted and performance shares issued | 1 year |
Restricted and Performance-Based Shares [Member] | Executives and Directors [Member] | Maximum [Member] |  |
Restricted and Performance Stock Grants [Abstract] |  |
Holding period for restricted and performance shares issued | 2 years |
2016 Omnibus Incentive Plan [Member] | Employees and Directors [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Abstract] |  |
Shares authorized for issuance (in shares) | 2,050,000 |

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