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Tax Credit Investments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Income Tax Disclosure [Abstract]          
Affordable housing tax credit investments $ 168,500   $ 168,500   $ 161,052
Other tax credit investments 62,043   62,043   42,987
Total TCIs 230,543   230,543   204,039
Unfunded affordable housing tax credit commitments 56,630   56,630   49,364
Other tax credit liabilities 48,113   48,113   33,941
Total unfunded tax credit commitments and liabilities 104,743   104,743   $ 83,305
Affordable housing tax credits and other tax benefits (6,209) $ (6,543) (12,417) $ (13,031)  
Other tax credit investment credits and tax benefits (845) (722) (1,690) (1,445)  
Amortization of affordable housing investments, net of tax benefit 4,824 4,323 9,649 8,689  
Deferred tax expense 192 160 383 320  
Total net reduction in income tax expense (2,038) (2,782) (4,075) (5,467)  
Total amortization of TCIs $ 695 $ 1,563 $ 1,391 $ 3,094