REGULATORY AUTHORITIES - Additional Information (Details) $ in Thousands	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)
LFNY
Regulatory Requirements [Line Items]
Minimum net capital requirement as defined under exchange act	$ 5
Aggregate indebtedness to net capital ratio	0.78
Regulatory capital	$ 126,504
Regulatory capital in excess of minimum requirement	119,918
U.K. Subsidiaries
Regulatory Requirements [Line Items]
Regulatory capital	156,894
Regulatory capital in excess of minimum requirement	79,560
CFLF
Regulatory Requirements [Line Items]
Regulatory capital		$ 160,273
Regulatory capital in excess of minimum requirement		68,870
Combined European Regulated Group
Regulatory Requirements [Line Items]
Regulatory capital		182,588
Regulatory capital in excess of minimum requirement		$ 83,794
Other U.S. and Non-U.S. Subsidiaries
Regulatory Requirements [Line Items]
Regulatory capital	108,953
Regulatory capital in excess of minimum requirement	$ 84,860