Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 90,040	$ 60,956	$ 179,447	$ 119,592
Other comprehensive income (loss):
Change in fair value of interest rate swaps	(18,797)	6,305	(49,945)	(288)
Total comprehensive income	71,243	67,261	129,502	119,304
Less: comprehensive income attributable to noncontrolling interests	6,105	5,941	11,359	10,558
Comprehensive income attributable to common stockholders	$ 65,138	$ 61,320	$ 118,143	$ 108,746