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Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of the provision for income taxes, exclusive of tax effect of unrealized AFS securities gains and losses [Abstract]
Current income tax expense	$ 8,864	$ 11,560	$ 20,108
Deferred income tax expense (benefit)	2,030	(246)	(259)
Effect of Tax Cuts & Jobs Act benefit	0	0	(2,831)
Effect of Kentucky tax legislation benefit	(3,442)	0	0
Total income tax expense	$ 7,452	$ 11,314	$ 17,018
Corporate income tax rate	21.00%	21.00%	35.00%
Reconciliation of income tax expense at the statutory rate to actual income tax expense [Abstract]
Computed at the statutory rate	$ 15,118	$ 14,814	$ 23,979
Adjustments resulting from [Abstract]
Tax-exempt interest	(563)	(673)	(1,259)
Housing and new markets credits	(4,471)	(2,635)	(2,579)
Dividends received deduction	0	(9)	(129)
Bank owned life insurance	(284)	(599)	(492)
ESOP dividend deduction	(203)	(188)	(319)
Stock option exercises and restricted stock vesting	(10)	(39)	(170)
Effect of Tax Cuts & Jobs Act	0	0	(2,831)
Effect of KY tax legislation	(2,719)	0	0
State income taxes	405	409	429
Other	179	234	389
Total income tax expense	$ 7,452	$ 11,314	$ 17,018
Reconciliation of income tax expense at the statutory rate to actual income tax expense [Abstract]
Computed at the statutory rate	21.00%	21.00%	35.00%
Adjustments resulting from [Abstract]
Tax-exempt interest	(0.78%)	(0.95%)	(1.84%)
Housing and new markets credits	(6.21%)	(3.73%)	(3.76%)
Dividends received deduction	0.00%	(0.01%)	(0.19%)
Bank owned life insurance	(0.39%)	(0.85%)	(0.72%)
ESOP dividend deduction	(0.28%)	(0.27%)	(0.47%)
Stock option exercises and restricted stock vesting	(0.01%)	(0.06%)	(0.25%)
Effect of Tax Cuts & Jobs Act	0	0	(0.0413)
Effect of KY tax legislation	(3.78%)	0.00%	0.00%
State income taxes	0.56%	0.58%	0.63%
Other	0.24%	0.33%	0.57%
Total	10.35%	16.04%	24.84%
Deferred tax assets [Abstract]
Allowance for loan and lease losses	$ 8,757	$ 7,541
Interest on nonperforming loans	485	531
Accrued expenses	1,100	1,093
Allowance for other real estate owned	1,437	1,435
Unrealized losses on AFS securities	0	1,757
State net operating loss carryforward	3,786	3,957
Lease liabilities	3,859	0
Other	294	164
Total deferred tax assets	19,718	16,478
Deferred tax liabilities [Abstract]
Depreciation and amortization	(15,048)	(12,210)
FHLB stock dividends	(1,441)	(1,704)
Loan fee income	(656)	(419)
Mortgage servicing rights	(814)	(757)
Right of use assets	(3,698)	0
Unrealized gains on AFS securities	(1,534)	0
Limited partnership investments	(326)	(257)
Other	(1,101)	(537)
Total deferred tax liabilities	(24,618)	(15,884)
Beginning balance for valuation allowance for deferred tax asset	3,957	3,930
Change in valuation allowance	(3,747)	27
Ending balance for valuation allowance for deferred tax asset	210	3,957	$ 3,930
Net deferred tax liability	(5,110)	$ (3,363)
Loss carryforwards	$ 96,000

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-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319

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X

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e32123-109318

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