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Income Taxes TCIs and Related Unfunded Commitments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Affordable housing tax credit investments, net $ 170,115 $ 161,103  
Other tax credit investments, net 35,907 61,077  
Total TCIs, net 206,022 222,180  
Unfunded affordable housing tax credit commitments 58,312 53,108  
Other tax credit liabilities 28,361 46,814  
Total unfunded tax credit commitments and liabilities 86,673 99,922  
Tax credits and benefits (28,748) (27,154) $ (28,141)
Amortization of tax credits and benefits, net of tax benefits 23,446 19,298 17,378
Deferred tax expense 610 766 639
Total reduction in income tax expense (4,692) (7,090) (10,124)
Total amortization of TCIs $ 0 $ 2,783 $ 6,187