Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 15,917	$ 14,978	$ 31,375	$ 29,590
Other comprehensive income: cash flow hedges	2,709	25,384	8,160	32,419
Comprehensive income	18,626	40,362	39,535	62,009
Less comprehensive income attributable to noncontrolling interests	(3,132)	(5,567)	(6,913)	(10,039)
Comprehensive income attributable to common stockholders	$ 15,494	$ 34,795	$ 32,622	$ 51,970