WAREHOUSE AND OTHER LINES OF CREDIT - Warehouse Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Line of Credit Facility [Line Items]
Outstanding Balance	$ 2,443,802	$ 2,902,539
Warehouse and Revolving Credit Facilities
Line of Credit Facility [Line Items]
Committed Amount	1,451,000
Uncommitted Amount	2,899,000
Total Facility Amount	4,350,000
Outstanding Balance	2,443,802	2,902,539
Warehouse and Revolving Credit Facilities \| Facility 1
Line of Credit Facility [Line Items]
Committed Amount	400,000
Uncommitted Amount	600,000
Total Facility Amount	1,000,000
Outstanding Balance	435,936	536,653
Warehouse and Revolving Credit Facilities \| Facility 2
Line of Credit Facility [Line Items]
Committed Amount	1,000
Uncommitted Amount	299,000
Total Facility Amount	300,000
Outstanding Balance	168,709	251,540
Warehouse and Revolving Credit Facilities \| Facility 3
Line of Credit Facility [Line Items]
Committed Amount	0
Uncommitted Amount	225,000
Total Facility Amount	225,000
Outstanding Balance	135,235	73,419
Warehouse and Revolving Credit Facilities \| Facility 4
Line of Credit Facility [Line Items]
Committed Amount	0
Uncommitted Amount	175,000
Total Facility Amount	175,000
Outstanding Balance	74,724	162,446
Warehouse and Revolving Credit Facilities \| Facility 5
Line of Credit Facility [Line Items]
Committed Amount	0
Uncommitted Amount	200,000
Total Facility Amount	200,000
Outstanding Balance	0	0
Warehouse and Revolving Credit Facilities \| Facility 6
Line of Credit Facility [Line Items]
Committed Amount	0
Uncommitted Amount	300,000
Total Facility Amount	300,000
Outstanding Balance	220,181	285,854
Warehouse and Revolving Credit Facilities \| Facility 7
Line of Credit Facility [Line Items]
Committed Amount	0
Uncommitted Amount	0
Total Facility Amount	0
Outstanding Balance	0	300,000
Warehouse and Revolving Credit Facilities \| Facility 8
Line of Credit Facility [Line Items]
Committed Amount	250,000
Uncommitted Amount	350,000
Total Facility Amount	600,000
Outstanding Balance	264,413	445,828
Warehouse and Revolving Credit Facilities \| Facility 9
Line of Credit Facility [Line Items]
Committed Amount	0
Uncommitted Amount	600,000
Total Facility Amount	600,000
Outstanding Balance	344,604	546,799
Warehouse and Revolving Credit Facilities \| Facility 10
Line of Credit Facility [Line Items]
Committed Amount	300,000
Uncommitted Amount	0
Total Facility Amount	300,000
Outstanding Balance	300,000	300,000
Warehouse and Revolving Credit Facilities \| Facility 11
Line of Credit Facility [Line Items]
Committed Amount	0
Uncommitted Amount	150,000
Total Facility Amount	150,000
Outstanding Balance	0	0
Warehouse and Revolving Credit Facilities \| Facility 12
Line of Credit Facility [Line Items]
Committed Amount	500,000
Uncommitted Amount	0
Total Facility Amount	500,000
Outstanding Balance	$ 500,000	$ 0