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Tax Credit Investments (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Affordable housing tax credit investments $ 164,678   $ 161,052
Other tax credit investments 62,160   42,987
Total TCIs 226,838   204,039
Unfunded affordable housing tax credit commitments 48,873   49,364
Other tax credit liabilities 48,116   33,941
Total unfunded tax credit commitments and liabilities 96,989   $ 83,305
Affordable housing tax credits and other tax benefits (6,208) $ (6,488)  
Other tax credit investment credits and tax benefits (845) (723)  
Amortization of affordable housing investments, net of tax benefit 4,825 4,366  
Deferred tax expense 191 160  
Total net reduction in income tax expense (2,037) (2,685)  
Total amortization of TCIs $ 696 $ 1,531