Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Derivative asset, fair value	$ 173,528	$ 166,715
Derivative liability, gross liability	(291,250)	(296,766)
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	136,789	70,836
Derivative liability, notional amount	3,405	4,939
Derivative asset, fair value	465	182
Derivative liability, gross liability	(11)	(51)
Forward Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	36,500	0
Derivative liability, notional amount	0	10,000
Derivative asset, fair value	399	0
Derivative liability, gross liability	0	(147)
Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	410,749	171,317
Derivative liability, notional amount	3,925,331	3,802,480
Derivative asset, fair value	5,655	3,337
Derivative liability, gross liability	(283,189)	(280,401)
Interest Rate Swap With Counterparty [Member]
Derivative [Line Items]
Derivative asset, notional amount	3,925,331	3,802,480
Derivative liability, notional amount	410,749	171,317
Derivative asset, fair value	167,164	161,956
Derivative liability, gross liability	(6,022)	(3,703)
Balance Sheet Hedging Instruments
Derivative [Line Items]
Derivative asset, notional amount	200,000	600,000
Derivative liability, notional amount	1,300,000	1,000,000
Derivative asset, fair value	396	1,321
Derivative liability, gross liability	(2,002)	(12,163)
Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	21,527	11,123
Derivative liability, notional amount	20,839	3,672
Derivative asset, fair value	234	571
Derivative liability, gross liability	(238)	(85)
Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Derivative asset, notional amount	20,166	4,887
Derivative liability, notional amount	5,397	8,280
Derivative asset, fair value	313	101
Derivative liability, gross liability	$ (37)	$ (499)