Segment Reporting - Adjusted Pretax Operating Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net gains (losses) on investments and other financial instruments	$ (80,733)	$ 15,603	$ 60,277
Amortization of other acquired intangible assets	(4,308)	(3,450)	(5,144)
Impairment of other long-lived assets and other non-operating items	(14,850)	(3,561)	(7,759)
Pretax income	952,779	764,832	479,441
Corporate, non-segment
Segment Reporting Information [Line Items]
Adjusted pretax operating income (loss)	8,972	3,527	2,013
Adjustments
Segment Reporting Information [Line Items]
Net gains (losses) on investments and other financial instruments	(80,780)	14,094	60,277
Mortgage
Segment Reporting Information [Line Items]
Adjusted pretax operating income (loss)	1,131,943	781,546	453,294
Net gains (losses) on investments and other financial instruments	0	0	0
homegenius
Segment Reporting Information [Line Items]
Adjusted pretax operating income (loss)	(88,198)	(27,324)	(23,240)
Net gains (losses) on investments and other financial instruments	0	1,509	0
Mortgage and homegenius segment
Segment Reporting Information [Line Items]
Adjusted pretax operating income (loss)	$ 1,043,745	$ 754,222	$ 430,054