Fair Value Measurements - Roll Forward, Level 3 (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Rollforward for financial instruments measured at fair value using Level 3 inputs
Asset balance, beginning of period	$ 156,063	$ 219,400	$ 134,706	$ 215,558
Purchases/Additions	24,666	34,777	48,563	81,571
Sales/Reductions	(12,652)	(54,122)	(27,186)	(114,144)
Transfers to (from) Level 3	1,094	(2,549)	5,838	(1,808)
Total gains or losses (realized or unrealized):
Included in Net Income	3,276	(1,576)	10,526	14,753
Asset balance, end of period	172,447	195,930	172,447	195,930
Loans Held for Sale
Rollforward for financial instruments measured at fair value using Level 3 inputs
Asset balance, beginning of period	45,977	77,275	47,716	71,816
Purchases/Additions	13,456	18,962	20,442	31,456
Sales/Reductions	(12,090)	(22,272)	(24,748)	(29,511)
Transfers to (from) Level 3	1,094	(2,549)	5,838	(1,808)
Total gains or losses (realized or unrealized):
Included in Net Income	(6,705)	17	(7,516)	(520)
Asset balance, end of period	41,732	71,433	41,732	71,433
Loans Held For Investment
Rollforward for financial instruments measured at fair value using Level 3 inputs
Asset balance, beginning of period	9,611
Purchases/Additions			9,611
Sales/Reductions	(562)		(562)
Total gains or losses (realized or unrealized):
Included in Net Income	(22)		(22)
Asset balance, end of period	9,027		9,027
MSR asset
Rollforward for financial instruments measured at fair value using Level 3 inputs
Asset balance, beginning of period	100,475	142,125	86,990	143,742
Purchases/Additions	11,210	15,815	18,510	50,115
Sales/Reductions		(31,850)	(1,876)	(84,633)
Total gains or losses (realized or unrealized):
Included in Net Income	10,003	(1,593)	18,064	15,273
Asset balance, end of period	$ 121,688	$ 124,497	$ 121,688	$ 124,497