Derivative Financial Instruments - Gains And Losses On Banking Derivatives Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Banking Derivative Assets
Derivative Instruments, Gain (Loss) [Line Items]
Recorded gain (loss) on banking derivative	$ (777)	$ 6,944	$ 1,264
Banking Derivative Liability
Derivative Instruments, Gain (Loss) [Line Items]
Recorded gain (loss) on banking derivative	1,172	(7,477)	(1,431)
Mortgage Banking Derivative Asset
Derivative Instruments, Gain (Loss) [Line Items]
Recorded gain (loss) on banking derivative	(9,655)	27,396	4,837
Mortgage Banking Derivative Liability
Derivative Instruments, Gain (Loss) [Line Items]
Recorded gain (loss) on banking derivative	$ 246	$ (6,984)	$ (4,262)