RELATED-PARTY TRANSACTIONS - Amounts Due from and Due to Affiliates (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Due from affiliates:
Loans	$ 41,450	$ 38,091
Amounts due from non-consolidated funds	868	661
Payments made on behalf of non-consolidated entities	3,229	3,444
Non-interest bearing advances made to certain non-controlling interest holders and employees	3,529	2,393
Total due from affiliates	49,076	44,589
Due to affiliates:
Due to OCGH unitholders in connection with the tax receivable agreement	249,200	134,953
Amounts due to principals, certain non-controlling interest holders and employees	1,090	1,212
Total due to affiliates	$ 250,290	$ 136,165