Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative asset, fair value	$ 91,871	$ 158,647
Derivative liability, gross liability	(168,352)	(86,327)
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	128,465	261,428
Derivative liability, notional amount	19,948	2,549
Derivative asset, fair value	811	2,326
Derivative liability, gross liability	(616)	(23)
Forward Commitments [Member]
Derivative [Line Items]
Derivative asset, notional amount	35,000	51,000
Derivative liability, notional amount	0	0
Derivative asset, fair value	439	41
Derivative liability, gross liability	0	0
Interest Rate Swap with Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	790,286	3,213,924
Derivative liability, notional amount	3,134,128	752,462
Derivative asset, fair value	7,598	153,752
Derivative liability, gross liability	(152,409)	(4,766)
Interest Rate Swap With Counterparty [Member]
Derivative [Line Items]
Derivative asset, notional amount	3,134,128	752,462
Derivative liability, notional amount	790,286	3,213,924
Derivative asset, fair value	84,197	4,766
Derivative liability, gross liability	(7,891)	(79,889)
Balance Sheet Hedging Instruments
Derivative [Line Items]
Derivative asset, notional amount	900,000	500,000
Derivative liability, notional amount	100,000	500,000
Derivative asset, fair value	0	60
Derivative liability, gross liability	(7,356)	(1,432)
Foreign Exchange Contracts With Customer [Member]
Derivative [Line Items]
Derivative asset, notional amount	13,995	7,629
Derivative liability, notional amount	1,550	3,388
Derivative asset, fair value	737	229
Derivative liability, gross liability	(69)	(51)
Foreign Exchange Contracts With Correspondent Banks [Member]
Derivative [Line Items]
Derivative asset, notional amount	2,074	3,656
Derivative liability, notional amount	13,781	9,364
Derivative asset, fair value	76	69
Derivative liability, gross liability	$ (696)	$ (240)