Fair Value Measurements (Details 1) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	$ (284,580,000)	$ (368,642,000)
Loss attributable to redeemable noncontrolling interest	13,299,000	15,705,000
Total realized and unrealized gains (losses):
Included in earnings	633,000	(3,532,000)
Included in other comprehensive income	19,067,000	26,447,000
Included in additional paid-in capital	(28,390,000)	(9,939,000)
Balance, ending	(279,971,000)	(339,961,000)
Redeemable Noncontrolling Interest [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(171,743,000)	(240,790,000)
Loss attributable to redeemable noncontrolling interest	13,299,000	15,705,000
Total realized and unrealized gains (losses):
Included in earnings	0	0
Included in other comprehensive income	0	0
Included in additional paid-in capital	(28,390,000)	(9,939,000)
Balance, ending	(186,834,000)	(235,024,000)
Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(97,360,000)	(131,634,000)
Loss attributable to redeemable noncontrolling interest	0	0
Total realized and unrealized gains (losses):
Included in earnings	0	0
Included in other comprehensive income	19,067,000	26,447,000
Included in additional paid-in capital	0	0
Balance, ending	(78,293,000)	(105,187,000)
Net TRS [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(24,346,000)	(6,108,000)
Loss attributable to redeemable noncontrolling interest	0	0
Total realized and unrealized gains (losses):
Included in earnings	2,912,000	(432,000)
Included in other comprehensive income	0	0
Included in additional paid-in capital	0	0
Balance, ending	(21,434,000)	(6,540,000)
Fair value adjustment to the borrowings subject to TRS [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	8,869,000	9,890,000
Loss attributable to redeemable noncontrolling interest	0	0
Total realized and unrealized gains (losses):
Included in earnings	(2,279,000)	(3,100,000)
Included in other comprehensive income	0	0
Included in additional paid-in capital	0	0
Balance, ending	6,590,000	6,790,000
TRS Related [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(15,477,000)	3,782,000
Loss attributable to redeemable noncontrolling interest	0	0
Total realized and unrealized gains (losses):
Included in earnings	633,000	(3,532,000)
Included in other comprehensive income	0	0
Included in additional paid-in capital	0	0
Balance, ending	$ (14,844,000)	$ 250,000