Summary of Tax Effects of Temporary Differences (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Assets
Fund Management Fees	$ 8,728	$ 16,719
Equity-Based Compensation	54,810	45,329
Unrealized Gains from Investments	(117,685)	(58,499)
Depreciation and Amortization	1,285,042	1,257,145
Net Operating Loss Carry Forward	12	18,780
Other	(21,700)	6,137
Total Deferred Tax Assets	1,209,207	1,285,611
Deferred Tax Liabilities
Depreciation and Amortization	10	143
Total Deferred Tax Liabilities	$ 10	$ 143