Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income	$ 14,978	$ 8,075	$ 29,590	$ 14,777
Other comprehensive income (loss): cash flow hedges	25,384	(9,465)	32,419	597
Comprehensive income (loss)	40,362	(1,390)	62,009	15,374
Less comprehensive (income) loss attributable to noncontrolling interests	(5,567)	90	(10,039)	(4,851)
Comprehensive income (loss) attributable to common stockholders	$ 34,795	$ (1,300)	$ 51,970	$ 10,523