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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Components of the provision for income taxes, exclusive of tax effect of unrealized AFS securities gains and losses [Abstract] |  |  |
Current income tax expense | $ 11,560 | $ 20,108 | $ 18,417
Deferred income tax expense (benefit) | (246) | (259) | 701
Effect of Tax Cuts & Jobs Act (benefit) | 0 | (2,831) | 0
Total income tax expense | $ 11,314 | $ 17,018 | $ 19,118
Federal corporate income tax rate | 21.00% | 35.00% | 35.00%
Reconciliation of income tax expense at the statutory rate to actual income tax expense [Abstract] |  |  |
Computed at the statutory rate | $ 14,814 | $ 23,979 | $ 23,262
Adjustments resulting from [Abstract] |  |  |
Tax-exempt interest | (673) | (1,259) | (1,289)
Housing and new markets credits | (2,635) | (2,579) | (2,680)
Dividends received deduction | (9) | (129) | (136)
Bank owned life insurance | (599) | (492) | (518)
ESOP dividend deduction | (188) | (319) | (313)
Stock option exercises and restricted stock vesting | (39) | (170) | 0
Effect of Tax Cuts & Jobs Act | 0 | (2,831) | 0
Other, net | 643 | 818 | 792
Total income tax expense | $ 11,314 | $ 17,018 | $ 19,118
Reconciliation of income tax expense at the statutory rate to actual income tax expense [Abstract] |  |  |
Computed at the statutory rate | 21.00% | 35.00% | 35.00%
Adjustment resulting from [Abstract] |  |  |
Tax-exempt interest | (0.95%) | (1.84%) | (1.94%)
Housing and new markets credits | (3.73%) | (3.76%) | (4.03%)
Dividends received deduction | (0.01%) | (0.19%) | (0.20%)
Bank owned life insurance | (0.85%) | (0.72%) | (0.78%)
ESOP dividend deduction | (0.27%) | (0.47%) | (0.47%)
Stock option exercises and restricted stock vesting | (0.06%) | (0.25%) | 0.00%
Effect of Tax Cuts & Jobs Act | (0.00%) | (4.13%) | 0.00%
Other, net | 0.91% | 1.20% | 1.18%
Total | 16.04% | 24.84% | 28.76%
Deferred tax assets [Abstract] |  |  |
Allowance for loan and lease losses | $ 7,541 | $ 7,592 |
Interest on nonperforming loans | 531 | 560 |
Accrued expenses | 1,093 | 442 |
Allowance for other real estate owned | 1,435 | 1,322 |
Limited partnership investments | 0 | 64 |
Unrealized losses on AFS securities | 1,757 | 932 |
Other | 164 | 204 |
Total deferred tax assets | 12,521 | 11,116 |
Deferred tax liabilities [Abstract] |  |  |
Depreciation and amortization | (12,210) | (12,270) |
FHLB stock dividends | (1,704) | (2,076) |
Loan fee income | (419) | (263) |
Mortgage servicing rights | (757) | (732) |
Capitalized lease obligations | 0 | (14) |
Limited partnership investments | (257) | 0 |
Other | (537) | (195) |
Total deferred tax liabilities | (15,884) | (15,550) |
Net deferred tax liability | $ (3,363) | $ (4,434) |

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