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Borrowing Arrangements (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Other borrowings $ 79,698 $ 76,443
FHLB borrowings 611,719 731,909
Other borrowings:    
Debt Instrument [Line Items]    
Other borrowings 79,698 76,443
Average amount outstanding during the period [1] 108,352 205,743
Maximum amount outstanding during the period [2] $ 259,317 $ 597,765
Weighted average interest rate during the period [3] 5.30% 5.70%
Interest rate at end of the period [4] 3.50% 3.60%
FHLB borrowings:    
Debt Instrument [Line Items]    
FHLB borrowings $ 611,719 $ 731,909
Average amount outstanding during the period [1] 614,897 601,366
Maximum amount outstanding during the period [2] $ 651,782 $ 760,046
Weighted average interest rate during the period [3] 3.90% 4.10%
Interest rate at end of the period [5] 4.00% 3.70%
[1] The average amount outstanding during the period was computed by dividing the total daily outstanding principal balances by the number of days in the period.
[2] The maximum amount outstanding at any month-end during the period.
[3] The weighted average interest rate during the period was computed by dividing the actual interest expense (annualized for interim periods) by the average amount outstanding during the period. The weighted average interest rate on FHLB borrowings includes the effect of interest rate swaps.
[4] Stated rate.
[5] The interest rate on FHLB borrowings includes the effect of interest rate swaps.