Revenues and NOI for Reportable Segment (Detail) - Parent Company [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Information
Total operating revenues	$ 378,908	$ 269,016
Net Operating Income	237,635	168,135
Depreciation and amortization	(129,997)	(75,127)
Acquisition expense	0	(713)
Property management expense	(10,981)	(9,004)
General and administrative expense	(12,840)	(6,582)
Merger related expenses	(2,871)	0
Business Combination, Integration Related Costs	3,290	0
Interest and other non-property (expense) income	2,679	32
Interest expense	(36,584)	(32,211)
Loss on debt extinguishment	123	3
Gain on sale of depreciable real estate assets excluded from discontinued operations	(73)	755
Net casualty loss after insurance and other settlement proceeds	(91)	(947)
Income tax expense	(651)	(288)
Gain on sale of non-depreciable real estate assets	0	1,627
Gain (loss) from real estate joint ventures	357	128
Net income attributable to noncontrolling interests	(1,511)	(2,395)
Preferred Stock Dividends, Income Statement Impact	922	0
Net Income (Loss) Available to Common Stockholders, Basic	40,983	43,413
Large Market Same Store
Segment Information
Total property revenues	166,258	160,192
Net Operating Income	104,747	99,527
Secondary Market Same Store
Segment Information
Total property revenues	86,147	84,093
Net Operating Income	54,238	53,394
Non-Same Store and Other
Segment Information
Total property revenues	126,503	24,731
Net Operating Income	$ 78,650	$ 15,214