Derivative Financial Instruments - Offsetting of Derivative Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Derivatives subject to master netting arrangements:
Gross amounts of recognized assets	$ 476,455	$ 75,199
Gross amounts offset in the consolidated balance sheet	(331,101)	(64,977)
Net amounts of assets presented in the consolidated balance sheet	145,354	10,222
Total
Gross amounts of recognized assets	556,172	398,672
Net amounts of assets presented in the balance sheet	225,071	333,695
Interest rate lock commitments
Derivatives not subject to master netting arrangements
Gross amounts of recognized assets	79,717	323,473
Total
Net amounts of assets presented in the balance sheet	79,717	323,473
MBS put options
Derivatives subject to master netting arrangements:
Gross amounts of recognized assets	43,543	7,655
Net amounts of assets presented in the consolidated balance sheet	43,543	7,655
Total
Gross amounts of recognized assets	43,543	7,655
Swaptions | Purchases
Derivatives subject to master netting arrangements:
Gross amounts of recognized assets		1,625
Net amounts of assets presented in the consolidated balance sheet		1,625
Total
Gross amounts of recognized assets		1,625
Forward contracts | Purchases
Derivatives subject to master netting arrangements:
Gross amounts of recognized assets	21,152	20,485
Net amounts of assets presented in the consolidated balance sheet	21,152	20,485
Total
Gross amounts of recognized assets	21,152	20,485
Forward contracts | Sales
Derivatives subject to master netting arrangements:
Gross amounts of recognized assets	316,856	40,215
Net amounts of assets presented in the consolidated balance sheet	316,856	40,215
Total
Gross amounts of recognized assets	316,856	40,215
Put options on Eurodollar futures | Purchases
Derivatives subject to master netting arrangements:
Gross amounts of recognized assets	93,220	3,141
Net amounts of assets presented in the consolidated balance sheet	93,220	3,141
Total
Gross amounts of recognized assets	93,220	3,141
Call options on Eurodollar futures | Purchases
Derivatives subject to master netting arrangements:
Gross amounts of recognized assets	1,684	2,078
Net amounts of assets presented in the consolidated balance sheet	1,684	2,078
Total
Gross amounts of recognized assets	$ 1,684	$ 2,078