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Schedule III Real Estate and Accumulated Depreciation (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
property
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
SEC Schedule III        
Number of Properties | property 6,484      
Encumbrances $ 408,419,373      
Initial Cost to Company        
Land 5,704,816,590      
Buildings, Improvements and Acquisition Fees 13,857,381,432      
Cost Capitalized Subsequent to Acquisition        
Improvements 65,373,623      
Carrying Costs 10,055,207      
Gross Amounts at Which Carried at Close of Period        
Land 5,704,816,590      
Buildings, Improvements and Acquisition Fees 13,932,810,262      
Total 19,637,626,852 $ 16,566,601,986 $ 15,027,043,415 $ 13,904,519,436
Accumulated Depreciation $ 3,140,854,604 $ 2,723,085,290 $ 2,350,544,126 $ 2,000,728,517
U.S. | Aerospace        
SEC Schedule III        
Number of Properties | property 5      
Encumbrances $ 14,409,617      
Initial Cost to Company        
Land 6,890,774      
Buildings, Improvements and Acquisition Fees 110,783,380      
Cost Capitalized Subsequent to Acquisition        
Improvements 216,638      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 6,890,774      
Buildings, Improvements and Acquisition Fees 111,000,018      
Total 117,890,792      
Accumulated Depreciation $ 28,630,112      
U.S. | Aerospace | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Aerospace | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Apparel stores        
SEC Schedule III        
Number of Properties | property 30      
Encumbrances $ 13,925,000      
Initial Cost to Company        
Land 58,918,135      
Buildings, Improvements and Acquisition Fees 141,491,607      
Cost Capitalized Subsequent to Acquisition        
Improvements 3,983,429      
Carrying Costs 218,760      
Gross Amounts at Which Carried at Close of Period        
Land 58,918,135      
Buildings, Improvements and Acquisition Fees 145,693,796      
Total 204,611,931      
Accumulated Depreciation $ 47,856,451      
U.S. | Apparel stores | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 4 years      
U.S. | Apparel stores | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Automotive collision services        
SEC Schedule III        
Number of Properties | property 75      
Encumbrances $ 0      
Initial Cost to Company        
Land 52,729,547      
Buildings, Improvements and Acquisition Fees 119,655,706      
Cost Capitalized Subsequent to Acquisition        
Improvements 1,799,680      
Carrying Costs 10,000      
Gross Amounts at Which Carried at Close of Period        
Land 52,729,547      
Buildings, Improvements and Acquisition Fees 121,465,386      
Total 174,194,933      
Accumulated Depreciation $ 28,390,510      
U.S. | Automotive collision services | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 19 years      
U.S. | Automotive collision services | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Automotive parts        
SEC Schedule III        
Number of Properties | property 249      
Encumbrances $ 6,637,578      
Initial Cost to Company        
Land 96,978,473      
Buildings, Improvements and Acquisition Fees 248,888,548      
Cost Capitalized Subsequent to Acquisition        
Improvements 4,622,175      
Carrying Costs 826,885      
Gross Amounts at Which Carried at Close of Period        
Land 96,978,473      
Buildings, Improvements and Acquisition Fees 254,337,608      
Total 351,316,081      
Accumulated Depreciation $ 64,101,899      
U.S. | Automotive parts | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Automotive parts | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Automotive service        
SEC Schedule III        
Number of Properties | property 303      
Encumbrances $ 0      
Initial Cost to Company        
Land 143,625,084      
Buildings, Improvements and Acquisition Fees 210,090,349      
Cost Capitalized Subsequent to Acquisition        
Improvements 582,498      
Carrying Costs 164,051      
Gross Amounts at Which Carried at Close of Period        
Land 143,625,084      
Buildings, Improvements and Acquisition Fees 210,836,898      
Total 354,461,982      
Accumulated Depreciation $ 66,008,493      
U.S. | Automotive service | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Automotive service | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Automotive tire services        
SEC Schedule III        
Number of Properties | property 196      
Encumbrances $ 0      
Initial Cost to Company        
Land 122,250,160      
Buildings, Improvements and Acquisition Fees 225,175,623      
Cost Capitalized Subsequent to Acquisition        
Improvements 384,194      
Carrying Costs 97,335      
Gross Amounts at Which Carried at Close of Period        
Land 122,250,160      
Buildings, Improvements and Acquisition Fees 225,657,152      
Total 347,907,312      
Accumulated Depreciation $ 115,198,601      
U.S. | Automotive tire services | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Automotive tire services | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 40 years      
U.S. | Beverages        
SEC Schedule III        
Number of Properties | property 18      
Encumbrances $ 0      
Initial Cost to Company        
Land 213,728,623      
Buildings, Improvements and Acquisition Fees 105,911,254      
Cost Capitalized Subsequent to Acquisition        
Improvements 0      
Carrying Costs 148      
Gross Amounts at Which Carried at Close of Period        
Land 213,728,623      
Buildings, Improvements and Acquisition Fees 105,911,402      
Total 319,640,025      
Accumulated Depreciation $ 40,267,343      
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Book stores        
SEC Schedule III        
Number of Properties | property 1      
Encumbrances $ 0      
Initial Cost to Company        
Land 998,250      
Buildings, Improvements and Acquisition Fees 3,696,707      
Cost Capitalized Subsequent to Acquisition        
Improvements 129,751      
Carrying Costs 79      
Gross Amounts at Which Carried at Close of Period        
Land 998,250      
Buildings, Improvements and Acquisition Fees 3,826,537      
Total 4,824,787      
Accumulated Depreciation $ 3,433,527      
U.S. | Book stores | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 24 years      
U.S. | Book stores | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Child care        
SEC Schedule III        
Number of Properties | property 274      
Encumbrances $ 0      
Initial Cost to Company        
Land 95,553,417      
Buildings, Improvements and Acquisition Fees 212,059,451      
Cost Capitalized Subsequent to Acquisition        
Improvements 5,053,358      
Carrying Costs 917,720      
Gross Amounts at Which Carried at Close of Period        
Land 95,553,417      
Buildings, Improvements and Acquisition Fees 218,030,529      
Total 313,583,946      
Accumulated Depreciation $ 105,257,799      
U.S. | Child care | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Child care | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Consumer appliances        
SEC Schedule III        
Number of Properties | property 4      
Encumbrances $ 0      
Initial Cost to Company        
Land 8,901,103      
Buildings, Improvements and Acquisition Fees 85,212,965      
Cost Capitalized Subsequent to Acquisition        
Improvements 109,951      
Carrying Costs 55      
Gross Amounts at Which Carried at Close of Period        
Land 8,901,103      
Buildings, Improvements and Acquisition Fees 85,322,971      
Total 94,224,074      
Accumulated Depreciation $ 13,916,454      
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Consumer electronics        
SEC Schedule III        
Number of Properties | property 10      
Encumbrances $ 0      
Initial Cost to Company        
Land 14,623,047      
Buildings, Improvements and Acquisition Fees 21,833,858      
Cost Capitalized Subsequent to Acquisition        
Improvements 884,168      
Carrying Costs 51,616      
Gross Amounts at Which Carried at Close of Period        
Land 14,623,047      
Buildings, Improvements and Acquisition Fees 22,769,642      
Total 37,392,689      
Accumulated Depreciation $ 11,068,011      
U.S. | Consumer electronics | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 22 years      
U.S. | Consumer electronics | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Consumer goods        
SEC Schedule III        
Number of Properties | property 4      
Encumbrances $ 0      
Initial Cost to Company        
Land 7,663,458      
Buildings, Improvements and Acquisition Fees 124,173,738      
Cost Capitalized Subsequent to Acquisition        
Improvements 894,295      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 7,663,458      
Buildings, Improvements and Acquisition Fees 125,068,033      
Total 132,731,491      
Accumulated Depreciation $ 22,472,474      
U.S. | Consumer goods | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 34 years      
U.S. | Consumer goods | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Convenience stores        
SEC Schedule III        
Number of Properties | property 1,246      
Encumbrances $ 0      
Initial Cost to Company        
Land 1,047,085,568      
Buildings, Improvements and Acquisition Fees 1,333,428,902      
Cost Capitalized Subsequent to Acquisition        
Improvements (733,628)      
Carrying Costs 145,550      
Gross Amounts at Which Carried at Close of Period        
Land 1,047,085,568      
Buildings, Improvements and Acquisition Fees 1,332,840,824      
Total 2,379,926,392      
Accumulated Depreciation $ 322,769,573      
U.S. | Convenience stores | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Convenience stores | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 26 years      
U.S. | Crafts and novelties        
SEC Schedule III        
Number of Properties | property 19      
Encumbrances $ 0      
Initial Cost to Company        
Land 20,948,352      
Buildings, Improvements and Acquisition Fees 70,829,924      
Cost Capitalized Subsequent to Acquisition        
Improvements 881,481      
Carrying Costs 440,482      
Gross Amounts at Which Carried at Close of Period        
Land 20,948,352      
Buildings, Improvements and Acquisition Fees 72,151,887      
Total 93,100,239      
Accumulated Depreciation $ 14,466,453      
U.S. | Crafts and novelties | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 22 years      
U.S. | Crafts and novelties | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Diversified industrial        
SEC Schedule III        
Number of Properties | property 6      
Encumbrances $ 19,397,723      
Initial Cost to Company        
Land 10,231,370      
Buildings, Improvements and Acquisition Fees 108,326,826      
Cost Capitalized Subsequent to Acquisition        
Improvements 114,454      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 10,231,370      
Buildings, Improvements and Acquisition Fees 108,441,280      
Total 118,672,650      
Accumulated Depreciation $ 17,452,956      
U.S. | Diversified industrial | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Diversified industrial | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Dollar stores        
SEC Schedule III        
Number of Properties | property 1,302      
Encumbrances $ 11,127,000      
Initial Cost to Company        
Land 428,220,601      
Buildings, Improvements and Acquisition Fees 1,249,436,205      
Cost Capitalized Subsequent to Acquisition        
Improvements 1,459,285      
Carrying Costs 8,879      
Gross Amounts at Which Carried at Close of Period        
Land 428,220,601      
Buildings, Improvements and Acquisition Fees 1,250,904,369      
Total 1,679,124,970      
Accumulated Depreciation $ 251,174,478      
U.S. | Dollar stores | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Dollar stores | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Drug stores        
SEC Schedule III        
Number of Properties | property 387      
Encumbrances $ 130,834,786      
Initial Cost to Company        
Land 578,997,186      
Buildings, Improvements and Acquisition Fees 1,340,130,844      
Cost Capitalized Subsequent to Acquisition        
Improvements 4,948,980      
Carrying Costs 100,379      
Gross Amounts at Which Carried at Close of Period        
Land 578,997,186      
Buildings, Improvements and Acquisition Fees 1,345,180,203      
Total 1,924,177,389      
Accumulated Depreciation $ 305,323,601      
U.S. | Drug stores | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Drug stores | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Education        
SEC Schedule III        
Number of Properties | property 14      
Encumbrances $ 0      
Initial Cost to Company        
Land 6,739,123      
Buildings, Improvements and Acquisition Fees 21,648,901      
Cost Capitalized Subsequent to Acquisition        
Improvements 472,942      
Carrying Costs 155,418      
Gross Amounts at Which Carried at Close of Period        
Land 6,739,123      
Buildings, Improvements and Acquisition Fees 22,277,261      
Total 29,016,384      
Accumulated Depreciation $ 17,188,255      
U.S. | Education | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Education | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Electric utilities        
SEC Schedule III        
Number of Properties | property 1      
Encumbrances $ 0      
Initial Cost to Company        
Land 1,450,000      
Buildings, Improvements and Acquisition Fees 9,209,989      
Cost Capitalized Subsequent to Acquisition        
Improvements 0      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 1,450,000      
Buildings, Improvements and Acquisition Fees 9,209,989      
Total 10,659,989      
Accumulated Depreciation $ 1,678,439      
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Entertainment        
SEC Schedule III        
Number of Properties | property 10      
Encumbrances $ 0      
Initial Cost to Company        
Land 28,373,479      
Buildings, Improvements and Acquisition Fees 10,617,464      
Cost Capitalized Subsequent to Acquisition        
Improvements 327,607      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 28,373,479      
Buildings, Improvements and Acquisition Fees 10,945,071      
Total 39,318,550      
Accumulated Depreciation $ 6,178,632      
U.S. | Entertainment | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 24 years      
U.S. | Entertainment | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Equipment services        
SEC Schedule III        
Number of Properties | property 7      
Encumbrances $ 7,073,296      
Initial Cost to Company        
Land 4,116,067      
Buildings, Improvements and Acquisition Fees 54,045,575      
Cost Capitalized Subsequent to Acquisition        
Improvements 689,663      
Carrying Costs 140      
Gross Amounts at Which Carried at Close of Period        
Land 4,116,067      
Buildings, Improvements and Acquisition Fees 54,735,378      
Total 58,851,445      
Accumulated Depreciation $ 14,967,071      
U.S. | Equipment services | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Equipment services | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Financial services        
SEC Schedule III        
Number of Properties | property 239      
Encumbrances $ 13,800,000      
Initial Cost to Company        
Land 115,487,739      
Buildings, Improvements and Acquisition Fees 351,992,876      
Cost Capitalized Subsequent to Acquisition        
Improvements (3,690,753)      
Carrying Costs 101,099      
Gross Amounts at Which Carried at Close of Period        
Land 115,487,739      
Buildings, Improvements and Acquisition Fees 348,403,222      
Total 463,890,961      
Accumulated Depreciation $ 74,256,644      
U.S. | Financial services | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Financial services | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Food processing        
SEC Schedule III        
Number of Properties | property 7      
Encumbrances $ 28,867,158      
Initial Cost to Company        
Land 13,226,562      
Buildings, Improvements and Acquisition Fees 153,588,645      
Cost Capitalized Subsequent to Acquisition        
Improvements 210,469      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 13,226,562      
Buildings, Improvements and Acquisition Fees 153,799,114      
Total 167,025,676      
Accumulated Depreciation $ 20,948,814      
U.S. | Food processing | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Food processing | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | General merchandise        
SEC Schedule III        
Number of Properties | property 100      
Encumbrances $ 5,070,372      
Initial Cost to Company        
Land 104,508,825      
Buildings, Improvements and Acquisition Fees 436,513,003      
Cost Capitalized Subsequent to Acquisition        
Improvements (2,938,508)      
Carrying Costs 557,868      
Gross Amounts at Which Carried at Close of Period        
Land 104,508,825      
Buildings, Improvements and Acquisition Fees 434,132,363      
Total 538,641,188      
Accumulated Depreciation $ 63,223,300      
U.S. | General merchandise | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | General merchandise | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Government services        
SEC Schedule III        
Number of Properties | property 16      
Encumbrances $ 0      
Initial Cost to Company        
Land 8,093,555      
Buildings, Improvements and Acquisition Fees 121,514,780      
Cost Capitalized Subsequent to Acquisition        
Improvements 2,981,604      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 8,093,555      
Buildings, Improvements and Acquisition Fees 124,496,384      
Total 132,589,939      
Accumulated Depreciation $ 25,784,980      
U.S. | Government services | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Government services | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Grocery stores        
SEC Schedule III        
Number of Properties | property 132      
Encumbrances $ 38,621,000      
Initial Cost to Company        
Land 264,275,526      
Buildings, Improvements and Acquisition Fees 780,156,042      
Cost Capitalized Subsequent to Acquisition        
Improvements 1,811,459      
Carrying Costs 325,183      
Gross Amounts at Which Carried at Close of Period        
Land 264,275,526      
Buildings, Improvements and Acquisition Fees 782,292,684      
Total 1,046,568,210      
Accumulated Depreciation $ 124,219,525      
U.S. | Grocery stores | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Grocery stores | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Health and beauty        
SEC Schedule III        
Number of Properties | property 2      
Encumbrances $ 0      
Initial Cost to Company        
Land 2,475,474      
Buildings, Improvements and Acquisition Fees 42,821,046      
Cost Capitalized Subsequent to Acquisition        
Improvements 68,912      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 2,475,474      
Buildings, Improvements and Acquisition Fees 42,889,958      
Total 45,365,432      
Accumulated Depreciation $ 1,979,227      
U.S. | Health and beauty | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Health and beauty | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Health and fitness        
SEC Schedule III        
Number of Properties | property 103      
Encumbrances $ 4,281,354      
Initial Cost to Company        
Land 246,562,831      
Buildings, Improvements and Acquisition Fees 990,068,700      
Cost Capitalized Subsequent to Acquisition        
Improvements 8,099,776      
Carrying Costs 172,145      
Gross Amounts at Which Carried at Close of Period        
Land 246,562,831      
Buildings, Improvements and Acquisition Fees 998,340,621      
Total 1,244,903,452      
Accumulated Depreciation $ 225,107,912      
U.S. | Health and fitness | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Health and fitness | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Health care        
SEC Schedule III        
Number of Properties | property 64      
Encumbrances $ 4,079,345      
Initial Cost to Company        
Land 46,055,832      
Buildings, Improvements and Acquisition Fees 298,433,438      
Cost Capitalized Subsequent to Acquisition        
Improvements 3,748,031      
Carrying Costs 1,314,067      
Gross Amounts at Which Carried at Close of Period        
Land 46,055,832      
Buildings, Improvements and Acquisition Fees 303,495,536      
Total 349,551,368      
Accumulated Depreciation $ 55,246,790      
U.S. | Health care | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 14 years      
U.S. | Health care | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Home furnishings        
SEC Schedule III        
Number of Properties | property 73      
Encumbrances $ 9,700,000      
Initial Cost to Company        
Land 35,099,395      
Buildings, Improvements and Acquisition Fees 113,295,067      
Cost Capitalized Subsequent to Acquisition        
Improvements 2,562,697      
Carrying Costs 372,213      
Gross Amounts at Which Carried at Close of Period        
Land 35,099,395      
Buildings, Improvements and Acquisition Fees 116,229,977      
Total 151,329,372      
Accumulated Depreciation $ 39,350,470      
U.S. | Home furnishings | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Home furnishings | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Home improvement        
SEC Schedule III        
Number of Properties | property 77      
Encumbrances $ 17,725,463      
Initial Cost to Company        
Land 186,981,286      
Buildings, Improvements and Acquisition Fees 375,408,283      
Cost Capitalized Subsequent to Acquisition        
Improvements 2,113,587      
Carrying Costs 75,210      
Gross Amounts at Which Carried at Close of Period        
Land 186,981,286      
Buildings, Improvements and Acquisition Fees 377,597,080      
Total 564,578,366      
Accumulated Depreciation $ 69,273,547      
U.S. | Home improvement | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Home improvement | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Insurance        
SEC Schedule III        
Number of Properties | property 1      
Encumbrances $ 0      
Initial Cost to Company        
Land 634,343      
Buildings, Improvements and Acquisition Fees 6,331,030      
Cost Capitalized Subsequent to Acquisition        
Improvements 0      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 634,343      
Buildings, Improvements and Acquisition Fees 6,331,030      
Total 6,965,373      
Accumulated Depreciation $ 1,867,654      
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Jewelry        
SEC Schedule III        
Number of Properties | property 4      
Encumbrances $ 0      
Initial Cost to Company        
Land 0      
Buildings, Improvements and Acquisition Fees 8,268,989      
Cost Capitalized Subsequent to Acquisition        
Improvements 0      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 0      
Buildings, Improvements and Acquisition Fees 8,268,989      
Total 8,268,989      
Accumulated Depreciation $ 2,301,535      
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Machinery        
SEC Schedule III        
Number of Properties | property 1      
Encumbrances $ 0      
Initial Cost to Company        
Land 1,630,917      
Buildings, Improvements and Acquisition Fees 12,938,430      
Cost Capitalized Subsequent to Acquisition        
Improvements 0      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 1,630,917      
Buildings, Improvements and Acquisition Fees 12,938,430      
Total 14,569,347      
Accumulated Depreciation $ 3,859,965      
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Motor vehicle dealerships        
SEC Schedule III        
Number of Properties | property 28      
Encumbrances $ 0      
Initial Cost to Company        
Land 115,897,045      
Buildings, Improvements and Acquisition Fees 143,335,317      
Cost Capitalized Subsequent to Acquisition        
Improvements 0      
Carrying Costs 230      
Gross Amounts at Which Carried at Close of Period        
Land 115,897,045      
Buildings, Improvements and Acquisition Fees 143,335,547      
Total 259,232,592      
Accumulated Depreciation $ 50,293,566      
U.S. | Motor vehicle dealerships | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Motor vehicle dealerships | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Office supplies        
SEC Schedule III        
Number of Properties | property 8      
Encumbrances $ 0      
Initial Cost to Company        
Land 8,551,005      
Buildings, Improvements and Acquisition Fees 15,480,491      
Cost Capitalized Subsequent to Acquisition        
Improvements 955,594      
Carrying Costs 349,599      
Gross Amounts at Which Carried at Close of Period        
Land 8,551,005      
Buildings, Improvements and Acquisition Fees 16,785,684      
Total 25,336,689      
Accumulated Depreciation $ 13,661,632      
U.S. | Office supplies | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 22 years      
U.S. | Office supplies | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Other manufacturing        
SEC Schedule III        
Number of Properties | property 7      
Encumbrances $ 23,897,971      
Initial Cost to Company        
Land 8,893,136      
Buildings, Improvements and Acquisition Fees 104,286,273      
Cost Capitalized Subsequent to Acquisition        
Improvements 1,663,646      
Carrying Costs 240,191      
Gross Amounts at Which Carried at Close of Period        
Land 8,893,136      
Buildings, Improvements and Acquisition Fees 106,190,110      
Total 115,083,246      
Accumulated Depreciation $ 18,426,589      
U.S. | Other manufacturing | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 33 years      
U.S. | Other manufacturing | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Packaging        
SEC Schedule III        
Number of Properties | property 10      
Encumbrances $ 2,164,411      
Initial Cost to Company        
Land 20,323,553      
Buildings, Improvements and Acquisition Fees 163,714,298      
Cost Capitalized Subsequent to Acquisition        
Improvements 2,480,122      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 20,323,553      
Buildings, Improvements and Acquisition Fees 166,194,420      
Total 186,517,973      
Accumulated Depreciation $ 27,809,312      
U.S. | Packaging | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 24 years      
U.S. | Packaging | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Paper        
SEC Schedule III        
Number of Properties | property 2      
Encumbrances $ 0      
Initial Cost to Company        
Land 2,462,414      
Buildings, Improvements and Acquisition Fees 11,934,685      
Cost Capitalized Subsequent to Acquisition        
Improvements 44,759      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 2,462,414      
Buildings, Improvements and Acquisition Fees 11,979,444      
Total 14,441,858      
Accumulated Depreciation $ 3,405,630      
U.S. | Paper | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Paper | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Pet supplies and services        
SEC Schedule III        
Number of Properties | property 33      
Encumbrances $ 2,509,000      
Initial Cost to Company        
Land 21,563,825      
Buildings, Improvements and Acquisition Fees 101,699,137      
Cost Capitalized Subsequent to Acquisition        
Improvements 4,604,704      
Carrying Costs 243,582      
Gross Amounts at Which Carried at Close of Period        
Land 21,563,825      
Buildings, Improvements and Acquisition Fees 106,547,423      
Total 128,111,248      
Accumulated Depreciation $ 21,261,419      
U.S. | Pet supplies and services | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 11 years      
U.S. | Pet supplies and services | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Restaurants-casual dining        
SEC Schedule III        
Number of Properties | property 284      
Encumbrances $ 0      
Initial Cost to Company        
Land 241,578,772      
Buildings, Improvements and Acquisition Fees 459,061,392      
Cost Capitalized Subsequent to Acquisition        
Improvements 6,015,925      
Carrying Costs 2,104,667      
Gross Amounts at Which Carried at Close of Period        
Land 241,578,772      
Buildings, Improvements and Acquisition Fees 467,181,984      
Total 708,760,756      
Accumulated Depreciation $ 132,235,171      
U.S. | Restaurants-casual dining | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Restaurants-casual dining | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 40 years      
U.S. | Restaurants-quick service        
SEC Schedule III        
Number of Properties | property 907      
Encumbrances $ 0      
Initial Cost to Company        
Land 429,303,832      
Buildings, Improvements and Acquisition Fees 781,719,427      
Cost Capitalized Subsequent to Acquisition        
Improvements 501,803      
Carrying Costs 226,201      
Gross Amounts at Which Carried at Close of Period        
Land 429,303,832      
Buildings, Improvements and Acquisition Fees 782,447,431      
Total 1,211,751,263      
Accumulated Depreciation $ 152,596,196      
U.S. | Restaurants-quick service | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Restaurants-quick service | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 26 years      
U.S. | Shoe stores        
SEC Schedule III        
Number of Properties | property 3      
Encumbrances $ 8,519,815      
Initial Cost to Company        
Land 6,251,472      
Buildings, Improvements and Acquisition Fees 35,793,479      
Cost Capitalized Subsequent to Acquisition        
Improvements 214,466      
Carrying Costs 214,706      
Gross Amounts at Which Carried at Close of Period        
Land 6,251,472      
Buildings, Improvements and Acquisition Fees 36,222,651      
Total 42,474,123      
Accumulated Depreciation $ 9,719,936      
U.S. | Shoe stores | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 23 years      
U.S. | Shoe stores | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Sporting goods        
SEC Schedule III        
Number of Properties | property 22      
Encumbrances $ 0      
Initial Cost to Company        
Land 36,258,595      
Buildings, Improvements and Acquisition Fees 107,396,447      
Cost Capitalized Subsequent to Acquisition        
Improvements 1,854,750      
Carrying Costs 178,206      
Gross Amounts at Which Carried at Close of Period        
Land 36,258,595      
Buildings, Improvements and Acquisition Fees 109,429,403      
Total 145,687,998      
Accumulated Depreciation $ 26,537,565      
U.S. | Sporting goods | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Sporting goods | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Telecommunications        
SEC Schedule III        
Number of Properties | property 7      
Encumbrances $ 8,578,171      
Initial Cost to Company        
Land 9,269,789      
Buildings, Improvements and Acquisition Fees 68,360,132      
Cost Capitalized Subsequent to Acquisition        
Improvements 1,484,423      
Carrying Costs 21,884      
Gross Amounts at Which Carried at Close of Period        
Land 9,269,789      
Buildings, Improvements and Acquisition Fees 69,866,439      
Total 79,136,228      
Accumulated Depreciation $ 17,849,025      
U.S. | Telecommunications | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 22 years      
U.S. | Telecommunications | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.S. | Theaters        
SEC Schedule III        
Number of Properties | property 79      
Encumbrances $ 0      
Initial Cost to Company        
Land 231,747,795      
Buildings, Improvements and Acquisition Fees 829,701,257      
Cost Capitalized Subsequent to Acquisition        
Improvements 10,680,179      
Carrying Costs 270      
Gross Amounts at Which Carried at Close of Period        
Land 231,747,795      
Buildings, Improvements and Acquisition Fees 840,381,706      
Total 1,072,129,501      
Accumulated Depreciation $ 194,026,206      
U.S. | Theaters | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Theaters | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Transportation services        
SEC Schedule III        
Number of Properties | property 58      
Encumbrances $ 19,380,313      
Initial Cost to Company        
Land 109,027,503      
Buildings, Improvements and Acquisition Fees 824,491,647      
Cost Capitalized Subsequent to Acquisition        
Improvements (3,820,929)      
Carrying Costs 401,593      
Gross Amounts at Which Carried at Close of Period        
Land 109,027,503      
Buildings, Improvements and Acquisition Fees 821,072,311      
Total 930,099,814      
Accumulated Depreciation $ 160,485,427      
U.S. | Transportation services | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 24 years      
U.S. | Transportation services | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 36 years      
U.S. | Wholesale clubs        
SEC Schedule III        
Number of Properties | property 32      
Encumbrances $ 17,820,000      
Initial Cost to Company        
Land 170,229,880      
Buildings, Improvements and Acquisition Fees 325,098,377      
Cost Capitalized Subsequent to Acquisition        
Improvements (3,889,998)      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 170,229,880      
Buildings, Improvements and Acquisition Fees 321,208,379      
Total 491,438,259      
Accumulated Depreciation $ 94,747,849      
U.S. | Wholesale clubs | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Wholesale clubs | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.S. | Other        
SEC Schedule III        
Number of Properties | property 6      
Encumbrances $ 0      
Initial Cost to Company        
Land 7,254,447      
Buildings, Improvements and Acquisition Fees 24,355,185      
Cost Capitalized Subsequent to Acquisition        
Improvements 795,984      
Carrying Costs 18,796      
Gross Amounts at Which Carried at Close of Period        
Land 7,254,447      
Buildings, Improvements and Acquisition Fees 25,169,965      
Total 32,424,412      
Accumulated Depreciation $ 5,639,308      
U.S. | Other | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 0 years      
U.S. | Other | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 35 years      
U.K. | Grocery stores        
SEC Schedule III        
Number of Properties | property 17      
Encumbrances $ 0      
Initial Cost to Company        
Land 310,089,274      
Buildings, Improvements and Acquisition Fees 360,054,272      
Cost Capitalized Subsequent to Acquisition        
Improvements 0      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 310,089,274      
Buildings, Improvements and Acquisition Fees 360,054,272      
Total 670,143,546      
Accumulated Depreciation $ 6,933,409      
U.K. | Grocery stores | Minimum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 25 years      
U.K. | Grocery stores | Maximum        
Gross Amounts at Which Carried at Close of Period        
Life on which depreciation in latest Income Statement is Computed 115 years      
U.K. | Theaters        
SEC Schedule III        
Number of Properties | property 1      
Encumbrances $ 0      
Initial Cost to Company        
Land 2,060,151      
Buildings, Improvements and Acquisition Fees 2,921,471      
Cost Capitalized Subsequent to Acquisition        
Improvements 0      
Carrying Costs 0      
Gross Amounts at Which Carried at Close of Period        
Land 2,060,151      
Buildings, Improvements and Acquisition Fees 2,921,471      
Total 4,981,622      
Accumulated Depreciation $ 4,869      
Life on which depreciation in latest Income Statement is Computed 25 years