Income Tax - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Income Taxes [Line Items]
Previously acquired institutions amount of allocated income to bad debt deductions	$ 12,800
Unrecorded deferred income tax liability	2,700
State Tax Jurisdiction
Income Taxes [Line Items]
Tax credit carryforward	$ 50
Minimum | State Tax Jurisdiction
Income Taxes [Line Items]
Operating loss carry forward expiration year	2023