Segment Reporting - Direct-to-consumer Channel Volume (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest Rate Lock Commitment
Revenue, Major Customer [Line Items]
Direct-to-consumer	$ 0	$ 1,085,180,000	$ 663,848,000	$ 2,948,530,000
Retail	408,879,000	926,723,000	1,755,008,000	2,726,956,000
Mortgage loan, sales volume	$ 408,879,000	$ 2,011,903,000	$ 2,418,856,000	$ 5,675,486,000
Interest Rate Lock Commitment | Revenue Benchmark | Direct-to-consumer
Revenue, Major Customer [Line Items]
Volume/Sale % by line of business	0.00%	53.90%	27.40%	52.00%
Interest Rate Lock Commitment | Revenue Benchmark | Retail
Revenue, Major Customer [Line Items]
Volume/Sale % by line of business	100.00%	46.10%	72.60%	48.00%
Mortgage
Revenue, Major Customer [Line Items]
Direct-to-consumer	$ 48,490,000	$ 809,887,000	$ 1,024,838,000	$ 2,562,681,000
Retail	521,165,000	726,010,000	1,698,987,000	2,226,795,000
Mortgage loan, sales volume	$ 569,655,000	$ 1,535,897,000	$ 2,723,825,000	$ 4,789,476,000
Mortgage | Revenue Benchmark | Direct-to-consumer
Revenue, Major Customer [Line Items]
Volume/Sale % by line of business	8.50%	52.70%	37.60%	53.50%
Mortgage | Revenue Benchmark | Retail
Revenue, Major Customer [Line Items]
Volume/Sale % by line of business	91.50%	47.30%	62.40%	46.50%