Condensed Consolidated Statements of Changes in Unitholders' Capital (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended								3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Paid-in Capital [Member]	Sep. 30, 2012 Paid-in Capital [Member]	Sep. 30, 2013 Accumulated Deficit [Member]	Sep. 30, 2012 Accumulated Deficit [Member]	Sep. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Sep. 30, 2012 Accumulated Other Comprehensive Income (Loss) [Member]	Sep. 30, 2013 OCGH Non-controlling Interest in Consolidated Subsidiaries [Member]	Sep. 30, 2012 OCGH Non-controlling Interest in Consolidated Subsidiaries [Member]	Sep. 30, 2013 OCGH Non-controlling Interest in Consolidated Subsidiaries [Member]	Sep. 30, 2012 OCGH Non-controlling Interest in Consolidated Subsidiaries [Member]	Sep. 30, 2013 Class A Units [Member]	Sep. 30, 2012 Class A Units [Member]	Sep. 30, 2013 Class B Units [Member]	Sep. 30, 2012 Class B Units [Member]	Sep. 30, 2012 Class C Units [Member]	Sep. 30, 2013 Class C Units [Member]	Dec. 31, 2012 Class C Units [Member]
Increase (decrease) in Stockholders' Equity:
Unitholders' capital, value	$ 1,393,893	$ 1,124,000	$ 645,053	$ 634,739	$ (336,903)	$ (444,713)	$ (1,748)	$ (1,884)			$ 1,087,491	$ 935,858
Unitholders' capital, shares													30,181,000	22,664,000	120,268,000	125,847,000	13,000	0	0
Issuance of units, Shares													8,058,000	7,904,000	673,000	2,358,000
Issuance of units, Value	419,908	322,260	419,908	322,260
Cancellation of Class B units associated with forfeitures of OCGH units															(44,000)	(5,000)
Cancellation of Class B units															(8,076,000)	(7,904,000)
Purchase of OCGH units from OCGH unitholders	(419,908)	(322,260)	(419,908)	(322,260)
Deferred tax effect resulting from the purchase of OCGH units	20,161	15,490	20,161	15,490
Repurchase and cancellation of OCGH units	(833)	(675)									(833)	(675)
Conversion of Class C units into Class A units														13,000			13,000
Repurchase and cancellation of Class A units														(400,000)
Repurchase and cancellation of Class A units		(14,132)		(14,132)
Equity reallocation between controlling and non-controlling interests	76,685	69,101	76,685	69,101							(76,685)	(69,101)
Capital increase related to equity-based compensation	20,877	27,482	4,700	4,871							16,177	22,611
Distributions declared	(659,100)	(329,275)	(131,999)	(50,189)							(527,101)	(279,086)
Net income	774,282	447,895			157,091	68,539					617,191	379,356
Foreign currency translation adjustment, net of tax	(773)	1,141					(1)	194	2,306	1,047	(772)	947
Unrealized gain on interest-rate swap designated as cash-flow hedge, net of tax	3,000	(1,214)					638	(246)			2,362	(968)
Unitholders' capital, value	$ 1,551,507	$ 1,270,712	$ 614,600	$ 659,880	$ (179,812)	$ (376,174)	$ (1,111)	$ (1,936)	$ 1,117,830	$ 988,942	$ 1,117,830	$ 988,942
Unitholders' capital, shares													38,239,000	30,181,000	112,821,000	120,296,000	0	0	0