Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative asset, fair value	$ 176,362	$ 158,647
Derivative liability, gross liability	(314,633)	(86,327)
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	73,375	261,428
Derivative liability, notional amount	32,398	2,549
Derivative asset, fair value	127	2,326
Derivative liability, gross liability	(736)	(23)
Forward Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	75,000	51,000
Derivative liability, notional amount	0	0
Derivative asset, fair value	2,646	41
Derivative liability, gross liability	0	0
Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	0	3,213,924
Derivative liability, notional amount	3,980,850	752,462
Derivative asset, fair value	0	153,752
Derivative liability, gross liability	(303,249)	(4,766)
Interest Rate Swap With Counterparty [Member]
Derivative [Line Items]
Derivative asset, notional amount	3,980,850	752,462
Derivative liability, notional amount	0	3,213,924
Derivative asset, fair value	176,276	4,766
Derivative liability, gross liability	0	(79,889)
Balance Sheet Hedging Instruments
Derivative [Line Items]
Derivative asset, notional amount	0	500,000
Derivative liability, notional amount	1,000,000	500,000
Derivative asset, fair value	0	60
Derivative liability, gross liability	(10,453)	(1,432)
Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	12,965	7,629
Derivative liability, notional amount	2,810	3,388
Derivative asset, fair value	941	229
Derivative liability, gross liability	(75)	(51)
Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Derivative asset, notional amount	3,212	3,656
Derivative liability, notional amount	13,372	9,364
Derivative asset, fair value	86	69
Derivative liability, gross liability	$ (931)	$ (240)