Mortgage Banking Activities Mortgage Banking Activities, Mortgage Banking Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Mortgage Banking Revenue [Abstract]
Net realized gains on sale of mortgage loans	$ 3,158	$ 20,783	$ 10,041	$ 46,783
Net change in unrealized gain (loss) on mortgage loans held for sale	2,307	1,783	(3,520)	(5,172)
Net change in the fair value of mortgage loan commitments	998	(1,253)	(2,300)	(10,233)
Net change in the fair value of forward sales contracts	(6,967)	(11,309)	330	3,913
Total production revenue	(504)	10,004	4,551	35,291
Servicing revenue	11,872	11,215	23,467	23,041
Total mortgage banking revenue	$ 11,368	$ 21,219	$ 28,018	$ 58,332