SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION - Summary of Activity (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($) item	Dec. 31, 2013 USD ($) item
Reconciliation of total real estate carrying value
Balance at Beginning of Period	$ 11,172,348,415	$ 9,918,069,735	$ 5,978,155,929
Acquisitions	1,279,388,017	1,463,440,724	4,701,785,534
Less amounts allocated to intangible assets that are included in Other Assets on our Consolidated Balance Sheets	(63,808,207)	(126,550,939)	(645,225,410)
Equipment	0	0	0
Improvements, Etc.	10,803,029	5,210,401	7,226,683
Other (Leasing Costs and Building Adjustments as a result of net debt premiums)	748,126	523,907	6,997,768
Total Additions	1,227,130,965	1,342,624,093	4,070,784,575
Cost of Real Estate sold or disposed of	76,659,381	83,059,172	127,218,307
Cost of Equipment sold	0	0	0
Releasing costs	592,815	732,130	251,616
Other (including Provisions for Impairment)	11,380,399	4,554,113	3,400,846
Total Deductions	88,632,595	88,345,414	130,870,769
Balance at Close of Period	12,310,846,785	11,172,348,415	9,918,069,735
Reconciliation of accumulated depreciation for the years ended:
Balance at Beginning of Period	1,390,808,700	1,121,460,394	936,019,074
Additions During Period - Provision for Depreciation	320,512,807	290,551,867	242,619,990
Deductions During Period: Accumulated depreciation of real estate and equipment sold or disposed of	19,358,359	21,203,561	57,178,670
Balance at Close of Period	$ 1,691,963,148	$ 1,390,808,700	$ 1,121,460,394
Number of properties on which provisions for impairment were recorded | item	15	12	9
Adjustments to estimated legal obligations related to asset retirement obligations	$ 820,166	$ (83,532)	$ 64,399
Number of land leases with adjustments recorded to estimated legal obligations related to asset retirement obligations | item	2