Borrowed Funds - Schedule of Pledged Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Loans	$ 10,068,209	$ 10,136,721
Debt securities	744,944	753,892
Assets	13,418,978	13,538,253
FHLB and FRB
Debt Instrument [Line Items]
Loans	7,336,405	7,255,671
Debt securities	1,244,634	1,051,558
Assets	8,581,039	8,307,229
Repurchase agreements
Debt Instrument [Line Items]
Loans	0	0
Debt securities	101,526	103,416
Assets	101,526	103,416
Total pledged assets
Debt Instrument [Line Items]
Loans	7,336,405	7,255,671
Debt securities	1,346,160	1,154,974
Assets	$ 8,682,565	$ 8,410,645