CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 161,673	$ 554,839	$ 522,912
Other comprehensive loss:
Interest rate cap	(42)	0	0
Comprehensive income	161,631	554,839	522,912
Less net income attributable to noncontrolling interests	15,543	37,844	35,350
Comprehensive income attributable to the Company	$ 146,088	$ 516,995	$ 487,562