Tax Credit Investments - Income Statement Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Components of Income Tax Expense:
Affordable housing tax credits and other tax benefits	$ 744	$ 897
Other tax credit investment credits and tax benefits	2,551	2,685
Total reduction in income tax expense	3,295	3,582
Non-Interest Expenses
Amortization of Tax Credit Investments:
Affordable housing tax credit investment losses	415	543
Affordable housing tax credit investment impairment losses	262	341
Other tax credit investment losses	309	173
Other tax credit investment impairment losses	1,910	1,687
Total amortization of tax credit investments recorded in non-interest expense	$ 2,896	$ 2,744