RELATED PARTY TRANSACTIONS - Amounts Due from and Due to Affiliates (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Due from affiliates:
Loans	$ 45,607	$ 38,091
Amounts due from non-consolidated funds	718	661
Payments made on behalf of non-consolidated entities	3,549	3,444
Non-interest bearing advances made to certain non-controlling interest holders and employees	2,298	2,393
Total due from affiliates	52,172	44,589
Due to affiliates:
Due to OCGH Unitholders in connection with the tax receivable agreement (please see note 11)	134,953	134,953
Amounts due to principals, certain non-controlling interest holders and employees	1,501	1,212
Total due to affiliates	$ 136,454	$ 136,165