Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Derivative asset, fair value	$ 142,337	$ 166,715
Derivative liability, gross liability	(231,088)	(296,766)
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	95,469	70,836
Derivative liability, notional amount	1,622	4,939
Derivative asset, fair value	420	182
Derivative liability, gross liability	(11)	(51)
Forward Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	0	0
Derivative liability, notional amount	8,500	10,000
Derivative asset, fair value	0	0
Derivative liability, gross liability	(31)	(147)
Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	422,891	171,317
Derivative liability, notional amount	3,628,451	3,802,480
Derivative asset, fair value	10,324	3,337
Derivative liability, gross liability	(220,342)	(280,401)
Interest Rate Swap With Counterparty [Member]
Derivative [Line Items]
Derivative asset, notional amount	3,628,451	3,802,480
Derivative liability, notional amount	422,891	171,317
Derivative asset, fair value	125,932	161,956
Derivative liability, gross liability	(10,690)	(3,703)
Balance Sheet Hedging Instruments
Derivative [Line Items]
Derivative asset, notional amount	1,500,000	600,000
Derivative liability, notional amount	0	1,000,000
Derivative asset, fair value	5,646	1,321
Derivative liability, gross liability	0	(12,163)
Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	19,026	11,123
Derivative liability, notional amount	10,290	3,672
Derivative asset, fair value	180	571
Derivative liability, gross liability	(380)	(85)
Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Derivative asset, notional amount	12,725	4,887
Derivative liability, notional amount	7,836	8,280
Derivative asset, fair value	435	101
Derivative liability, gross liability	$ (56)	$ (499)