Summary of Significant Accounting Policies (Details 12) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies
Interest expense									$ (1,137,139)	$ (1,127,025)	$ (983,526)
Net income attributable to noncontrolling interests									231,949	285,136	221,101
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	381,555	311,675	339,936	283,138	315,383	254,921	215,445	645,410	1,316,304	1,431,159	1,021,462
Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS									(7,888)
Accumulated derivative losses, net | Amount reclassified from accumulated other comprehensive income (loss)
Significant Accounting Policies
Interest expense									(9,205)
Net income attributable to noncontrolling interests									$ 1,317