Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Derivative [Line Items]
Derivative asset, fair value	$ 136,392	$ 157,612
Derivative liability, gross liability	(202,669)	(245,584)
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	209,060	119,558
Derivative liability, notional amount	662	1,015
Derivative asset, fair value	826	460
Derivative liability, gross liability	(2)	(2)
Forward Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	0	0
Derivative liability, notional amount	54,250	42,000
Derivative asset, fair value	0	0
Derivative liability, gross liability	(419)	(854)
Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	1,510,681	824,659
Derivative liability, notional amount	3,235,818	3,784,236
Derivative asset, fair value	43,692	22,656
Derivative liability, gross liability	(158,225)	(222,530)
Interest Rate Swap With Counterparty [Member]
Derivative [Line Items]
Derivative asset, notional amount	3,235,818	3,784,236
Derivative liability, notional amount	1,510,681	824,659
Derivative asset, fair value	89,902	128,235
Derivative liability, gross liability	(44,075)	(23,023)
Balance Sheet Hedging Instruments
Derivative [Line Items]
Derivative asset, notional amount	2,500,000	2,500,000
Derivative liability, notional amount	750,000	750,000
Derivative asset, fair value	2,395	6,189
Derivative liability, gross liability	(144)	0
Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	18,184	4,159
Derivative liability, notional amount	11,714	13,353
Derivative asset, fair value	345	40
Derivative liability, gross liability	(257)	(446)
Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Derivative asset, notional amount	23,531	15,969
Derivative liability, notional amount	7,236	6,112
Derivative asset, fair value	403	532
Derivative liability, gross liability	$ (225)	$ (31)