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Income Tax (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Reconciliation of Federal Statutory to Actual Tax Expense: |  |  |  |
Federal statutory income tax at 21% | $ 9,050 | $ 10,414 | $ 28,908 | $ 29,500
Tax-exempt interest income | (2,637) | (2,118) | (7,307) | (6,178)
Share-based compensation | (11) | (38) | (402) | (570)
Tax-exempt earnings and gains on life insurance | (241) | (197) | (647) | (655)
Tax credits | (61) | (42) | (202) | (65)
Other | 237 | 459 | 677 | 1,018
Actual Tax Expense | $ 6,337 | $ 8,478 | $ 21,027 | $ 23,050
Federal statutory income tax rate | 21.00% | 21.00% | 21.00% | 21.00%
Effective Tax Rate | 14.70% | 17.10% | 15.30% | 16.40%

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