Consolidated Statement of Changes in Capital Statement $ in Thousands	3 Months Ended
Mar. 31, 2017 USD ($)
Contributions	$ 47
Distributions	(154)
Buyout of Noncontrolling Interest - partially owned properties	(2,105)
Change in fair value of interest rate cap agreements	825
Net income	6,603
Operating Partnership
Beginning balance	1,782,318
Net Proceeds from sale of common shares	301,572
Restricted share award grants, net	(1,146)
Purchase of OP Units	(3,725)
Conversion of OP Units	0
OP Units - distributions	(35,749)
Preferred distributions	(211)
Issuance of OP Units in connection with acquisitions	44,259
Contributions	47
Distributions	(154)
Buyout of Noncontrolling Interest - partially owned properties	(2,105)
Change in fair value of interest rate cap agreements	825
Net income	6,603
Adjustments for Limited Partners ownership in Operating Partnership	0
Ending balance	2,092,534
Operating Partnership \| AOCI Attributable to Parent
Beginning balance	13,708
Change in fair value of interest rate cap agreements	825
Ending balance	14,533
Operating Partnership \| General Partner
Beginning balance	1,724,743
Net Proceeds from sale of common shares	301,572
Conversion of OP Units	264
OP Units - distributions	(34,581)
Preferred distributions	(211)
Issuance of OP Units in connection with acquisitions	0
Buyout of Noncontrolling Interest - partially owned properties	(2,800)
Net income	6,402
Adjustments for Limited Partners ownership in Operating Partnership	12,067
Ending balance	2,006,310
Operating Partnership \| Limited Partner
Beginning balance	43,142
Purchase of OP Units	(3,725)
Conversion of OP Units	(264)
OP Units - distributions	(1,168)
Issuance of OP Units in connection with acquisitions	44,259
Buyout of Noncontrolling Interest - partially owned properties	719
Net income	147
Adjustments for Limited Partners ownership in Operating Partnership	(12,067)
Ending balance	71,043
Operating Partnership \| Partners' Capital
Beginning balance	1,781,593
Net Proceeds from sale of common shares	301,572
Purchase of OP Units	(3,725)
OP Units - distributions	(35,749)
Preferred distributions	(211)
Issuance of OP Units in connection with acquisitions	44,259
Buyout of Noncontrolling Interest - partially owned properties	(2,081)
Change in fair value of interest rate cap agreements	825
Net income	6,549
Ending balance	2,091,886
Partially Owned Properties Noncontrolling Interest
Contributions	47
Distributions	(154)
Buyout of Noncontrolling Interest - partially owned properties	(24)
Net income	54
Partially Owned Properties Noncontrolling Interest \| Operating Partnership
Beginning balance	725
Issuance of OP Units in connection with acquisitions	0
Contributions	47
Distributions	(154)
Buyout of Noncontrolling Interest - partially owned properties	(24)
Net income	54
Ending balance	$ 648

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Partners' Capital Account, Preferred Distributions

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Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

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Amount after income tax of income (loss) including the portion attributable to nonredeemable noncontrolling interest. Excludes the portion attributable to redeemable noncontrolling interest recognized as temporary equity.

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Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.

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Amount of tax expense (benefit), before reclassification adjustments, related to increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Change in the different classes of partners' capital accounts during the year due to acquisitions. Partners include general, limited and preferred partners.

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Total distributions to each class of partners (i.e., general, limited and preferred partners).

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Total change in each class of partners' capital accounts during the year due to exchanges and conversions. Partners include general, limited and preferred partners.

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Total change in each class of partners' capital accounts during the year due to the sale of units. All partners include general, limited and preferred partners.

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Value of units that were previously issued and have been repurchased during the year.

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Total change in each class of partners' capital accounts during the year due to unit-based compensation. All partners include general, limited and preferred partners.

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Amount of partners' capital (deficit), including portions attributable to both the parent and noncontrolling interests. Excludes temporary equity and is sometimes called permanent equity.

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Amount of increase (decrease) in partners' capital classified as other.

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