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SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION - Summary of Activity (Details)
 12 Months Ended
Dec. 31, 2017
USD ($)
property
item
Dec. 31, 2016
USD ($)
property
Dec. 31, 2015
USD ($)
property
Reconciliation of total real estate carrying value for the years ended:      
Balance at Beginning of Period $ 13,904,519,436 $ 12,310,846,785 $ 11,172,348,415
Acquisitions 1,531,960,811 1,857,783,837 1,279,388,017
Less amounts allocated to acquired lease intangible assets and liabilities on our Consolidated Balance Sheets (238,556,294) (139,341,205) (63,808,207)
Equipment 0 0 0
Improvements, Etc. 11,067,322 16,405,486 10,803,029
Other (Leasing Costs and Building Adjustments as a result of net debt premiums) 1,584,152 1,495,439 748,126
Total Additions 1,306,055,991 1,736,343,557 1,227,130,965
Cost of Real Estate sold or disposed of 150,394,756 118,792,948 76,659,381
Cost of Equipment sold 0 0 0
Releasing costs 109,986 418,772 592,815
Other (including Provisions for Impairment) 33,027,270 23,459,186 11,380,399
Total Deductions 183,532,012 142,670,906 88,632,595
Balance at Close of Period 15,027,043,415 13,904,519,436 12,310,846,785
Reconciliation of accumulated depreciation for the years ended:      
Balance at Beginning of Period 2,000,728,517 1,691,963,148 1,390,808,700
Additions During Period - Provision for Depreciation 393,415,491 355,030,226 320,512,807
Deductions During Period: Accumulated depreciation of real estate and equipment sold or disposed of 43,599,882 46,264,857 19,358,359
Balance at Close of Period $ 2,350,544,126 $ 2,000,728,517 $ 1,691,963,148
Number of properties on which provisions for impairment were recorded | property 26 39 15
Adjustments to estimated legal obligations related to asset retirement obligations $ 9,774 $ 6,525 $ (820,166)
Number of land leases with adjustments recorded to estimated legal obligations related to asset retirement obligations | item 2