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Borrowed Funds - Schedule of Pledged Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Loans $ 9,986,949 $ 9,868,718
Debt securities 452,195 457,648
Assets 13,555,175 13,103,896
FHLB and FRB    
Debt Instrument [Line Items]    
Loans 7,052,912 6,487,980
Debt securities 1,120,068 830,057
Assets 8,172,980 7,318,037
Repurchase agreements    
Debt Instrument [Line Items]    
Loans 0 0
Debt securities 75,859 105,294
Assets 75,859 105,294
Total pledged assets    
Debt Instrument [Line Items]    
Loans 7,052,912 6,487,980
Debt securities 1,195,927 935,351
Assets $ 8,248,839 $ 7,423,331