Equity Method Investments (Details) loan in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan	Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Equity method investment income		$ 3,573	$ 13,620	$ 14,570	$ 13,620
Net income		11,828	6,491	29,160	25,573
Locked mortgage pipeline	$ 1,150,000	1,150,000		1,150,000		$ 1,540,000
Equity method investment	38,935	38,935		38,935		$ 46,494
Intercoastal
Schedule of Equity Method Investments [Line Items]
Equity method investment income		3,600		14,600
Interchecks
Schedule of Equity Method Investments [Line Items]
Increase in equity method investment	4,500
Equity method investment	$ 7,700	$ 7,700		$ 7,700
Ownership percentage	16.90%	16.90%		16.90%
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Intercoastal
Schedule of Equity Method Investments [Line Items]
Total revenues		$ 35,229	62,915	$ 126,106	62,915
Net income		9,962	28,979	36,747	28,979
Gain on sale of loans		$ 30,720	$ 39,518	$ 122,621	$ 39,518
Volume of loans sold | loan		1,098,475	1,215,512	4,368,875	1,215,512