SEGMENT AND GEOGRAPHIC DATA - Summary of Financial Information by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 167,863	$ 186,409	$ 504,247	$ 737,547
Total loans receivable	1,254,401		1,254,401		$ 1,254,395
U.S.
Segment Reporting Information [Line Items]
Total revenue	87,906	107,430	269,731	511,540
Total loans receivable	751,869		751,869		773,380
Canada
Segment Reporting Information [Line Items]
Total revenue	79,957	$ 78,979	234,516	$ 226,007
Total loans receivable	$ 502,532		$ 502,532		$ 481,015