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Income Taxes - Schedule of Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Tax provision at statutory rate	$ 21,657	$ 24,418	$ 23,830
Increase (decrease) in income taxes resulting from:
Tax-exempt interest income	(1,050)	(1,186)	(1,117)
Low income housing tax credits	(772)	(756)	(698)
Bank-owned life insurance income	(532)	(538)	(532)
Non-deductible interest expense	23	43	27
State income taxes, net of federal benefit	2,117	2,178	2,639
Change in valuation allowance	(20)	4	(8)
Impact of tax reform	0	(73)	0
Other, net	231	140	48
Income tax expense (benefit)	$ 21,654	$ 24,230	$ 24,189

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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