Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ (37,710)	$ 110,913	$ (440,981)
Other comprehensive income (loss):
Change in fair value of interest rate hedges	(33,682)	(50,638)	6,807
Reclassification adjustments associated with unrealized losses (gains) from interest rate hedges included in net income (loss)	(8)	(46)	470
Realized (gains) losses on interest rate hedges reclassified to earnings	42,820	46,111	45,476
Change in fair value of available-for-sale securities	178	(359)	(12,095)
Realized (gains) losses on available-for-sale securities reclassified to earnings	0	(3,697)	44,275
Realized (gains) losses on sales of assets of VIEs	0	0	28,196
Total other comprehensive income (loss)	9,308	(8,629)	113,129
Comprehensive income (loss) before allocation to noncontrolling interests	(28,402)	102,284	(327,852)
Allocation to noncontrolling interests	229	880	12,742
Comprehensive income (loss)	$ (28,173)	$ 103,164	$ (315,110)

Reclassification adjustment for gains or losses realized upon the sale of variable interest entities.

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