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Schedule III - Real Estate and Accumulated Depreciation - Section 4 (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 $ 1,917,132      
Land 2,884,968      
Buildings, Fixtures and Improvements 10,791,126      
Costs Capitalized Subsequent to Acquisition (83,654)      
Gross Amount Carried at December 31, 2018 13,592,440 $ 13,577,700 $ 13,539,921 $ 14,566,343
Accumulated Depreciation (2,622,879) $ (2,217,108) $ (1,766,006) $ (1,331,751)
Burger King [Member] | Roseburg, OR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 350      
Buildings, Fixtures and Improvements 886      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,236      
Accumulated Depreciation (260)      
Burger King [Member] | Harrisburg, PA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 619      
Buildings, Fixtures and Improvements 412      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,031      
Accumulated Depreciation (116)      
Burger King [Member] | Old Forge, PA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 390      
Buildings, Fixtures and Improvements 905      
Costs Capitalized Subsequent to Acquisition 126      
Gross Amount Carried at December 31, 2018 1,421      
Accumulated Depreciation (74)      
Burger King [Member] | Gaffney, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 370      
Buildings, Fixtures and Improvements 880      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,250      
Accumulated Depreciation (258)      
Burger King [Member] | Greenville, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 420      
Buildings, Fixtures and Improvements 571      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 991      
Accumulated Depreciation (167)      
Burger King [Member] | North Augusta, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 256      
Buildings, Fixtures and Improvements 1,451      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,707      
Accumulated Depreciation (407)      
Burger King [Member] | North Augusta, SC 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 450      
Buildings, Fixtures and Improvements 1,050      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,500      
Accumulated Depreciation (295)      
Burger King [Member] | Chattanooga, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 740      
Buildings, Fixtures and Improvements 1,591      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,331      
Accumulated Depreciation (467)      
Burger King [Member] | Gallatin, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 199      
Buildings, Fixtures and Improvements 463      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 662      
Accumulated Depreciation (130)      
Burger King [Member] | Austin, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 666      
Buildings, Fixtures and Improvements 999      
Costs Capitalized Subsequent to Acquisition (517)      
Gross Amount Carried at December 31, 2018 1,148      
Accumulated Depreciation (135)      
Burger King [Member] | Laredo, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 684      
Buildings, Fixtures and Improvements 1,026      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,710      
Accumulated Depreciation (288)      
Burger King [Member] | Texas City, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 421      
Buildings, Fixtures and Improvements 782      
Costs Capitalized Subsequent to Acquisition 300      
Gross Amount Carried at December 31, 2018 1,503      
Accumulated Depreciation (241)      
Burger King [Member] | Spanaway, WA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 509      
Buildings, Fixtures and Improvements 1,628      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,137      
Accumulated Depreciation (482)      
Burger King [Member] | Germantown, WI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 644      
Buildings, Fixtures and Improvements 1,300      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,944      
Accumulated Depreciation (385)      
Burger King [Member] | Marshfield, WI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 232      
Buildings, Fixtures and Improvements 885      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,117      
Accumulated Depreciation (262)      
Burger King [Member] | Rhinelander, WI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 260      
Buildings, Fixtures and Improvements 606      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 866      
Accumulated Depreciation (170)      
Burger King [Member] | Weston, WI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 329      
Buildings, Fixtures and Improvements 718      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,047      
Accumulated Depreciation (213)      
Burger King [Member] | Bluefield, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 210      
Buildings, Fixtures and Improvements 1,163      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,373      
Accumulated Depreciation (341)      
Burger King [Member] | Alpharetta, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 635      
Buildings, Fixtures and Improvements 865      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,500      
Accumulated Depreciation (256)      
Burger King [Member] | Atlanta, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 380      
Buildings, Fixtures and Improvements 499      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 879      
Accumulated Depreciation (146)      
Burger King [Member] | Blair, NE [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 272      
Buildings, Fixtures and Improvements 1,087      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,359      
Accumulated Depreciation (305)      
Burger King [Member] | Atmore, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 181      
Buildings, Fixtures and Improvements 723      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 904      
Accumulated Depreciation (203)      
Burger King [Member] | Martinez, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 909      
Buildings, Fixtures and Improvements 1,350      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,259      
Accumulated Depreciation (400)      
Burger King [Member] | Thomson, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 748      
Buildings, Fixtures and Improvements 876      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,624      
Accumulated Depreciation (260)      
Burger King [Member] | Springfield, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 983      
Buildings, Fixtures and Improvements 516      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,499      
Accumulated Depreciation (153)      
Burger King [Member] | Warren, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 248      
Buildings, Fixtures and Improvements 745      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 993      
Accumulated Depreciation (209)      
Burlington [Member] | Rogers, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,460      
Buildings, Fixtures and Improvements 6,379      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 7,839      
Accumulated Depreciation (149)      
Burlington [Member] | West Valley City, UT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 2,331      
Buildings, Fixtures and Improvements 5,821      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 8,152      
Accumulated Depreciation (257)      
Cabela's [Member] | Rogers, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 3,419      
Buildings, Fixtures and Improvements 17,605      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 21,024      
Accumulated Depreciation (647)      
Cabela's [Member] | Thornton, CO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 3,677      
Buildings, Fixtures and Improvements 19,099      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 22,776      
Accumulated Depreciation (685)      
Cabela's [Member] | Grandville, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 3,269      
Buildings, Fixtures and Improvements 20,328      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 23,597      
Accumulated Depreciation (739)      
Cabela's [Member] | Oklahoma City, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 3,383      
Buildings, Fixtures and Improvements 11,590      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 14,973      
Accumulated Depreciation (421)      
Cabela's [Member] | Lacey, WA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 3,393      
Buildings, Fixtures and Improvements 20,158      
Costs Capitalized Subsequent to Acquisition (29)      
Gross Amount Carried at December 31, 2018 23,522      
Accumulated Depreciation (769)      
Cactus Wellhead [Member] | Williston, ND [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 72      
Buildings, Fixtures and Improvements 3,735      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,807      
Accumulated Depreciation (713)      
Cactus Wellhead [Member] | Dubois, PA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 129      
Buildings, Fixtures and Improvements 2,542      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,671      
Accumulated Depreciation (513)      
Cactus Wellhead [Member] | Center, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 115      
Buildings, Fixtures and Improvements 1,886      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,001      
Accumulated Depreciation (380)      
Cactus Wellhead [Member] | Pleasanton, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 144      
Buildings, Fixtures and Improvements 2,908      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,052      
Accumulated Depreciation (592)      
Cadbury Holdings [Member] | Whippany, NJ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 2,767      
Buildings, Fixtures and Improvements 38,018      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 40,785      
Accumulated Depreciation (9,275)      
California Pizza Kitchen [Member] | Paradise Valley, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 2,285      
Buildings, Fixtures and Improvements 1,480      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,765      
Accumulated Depreciation (480)      
California Pizza Kitchen [Member] | Alpharetta, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,279      
Buildings, Fixtures and Improvements 3,249      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 4,528      
Accumulated Depreciation (946)      
California Pizza Kitchen [Member] | Atlanta, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 2,307      
Buildings, Fixtures and Improvements 1,857      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 4,164      
Accumulated Depreciation (587)      
California Pizza Kitchen [Member] | Schaumburg, IL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,180      
Buildings, Fixtures and Improvements 3,179      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 4,359      
Accumulated Depreciation (928)      
California Pizza Kitchen [Member] | Grapevine, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,544      
Buildings, Fixtures and Improvements 2,250      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,794      
Accumulated Depreciation (670)      
Captain D's [Member] | Statesboro, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 350      
Buildings, Fixtures and Improvements 401      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 751      
Accumulated Depreciation (118)      
Captain D's [Member] | Florence, KY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 248      
Buildings, Fixtures and Improvements 325      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 573      
Accumulated Depreciation (96)      
Captain D's [Member] | Southaven, MS [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 270      
Buildings, Fixtures and Improvements 564      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 834      
Accumulated Depreciation (165)      
Captain D's [Member] | Memphis, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 230      
Buildings, Fixtures and Improvements 338      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 568      
Accumulated Depreciation (99)      
Captain D's [Member] | Duncanville, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 295      
Buildings, Fixtures and Improvements 246      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 541      
Accumulated Depreciation (73)      
Cargill [Member] | Blair, NE [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 2,401      
Land 627      
Buildings, Fixtures and Improvements 4,989      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 5,616      
Accumulated Depreciation (1,080)      
Carl's Jr. [Member] | Purcell, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 77      
Buildings, Fixtures and Improvements 513      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 590      
Accumulated Depreciation (152)      
CarMax [Member] | Austin, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 9,900      
Land 5,461      
Buildings, Fixtures and Improvements 16,940      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 22,401      
Accumulated Depreciation (4,158)      
CarMax [Member] | Henderson, NV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 8,542      
Buildings, Fixtures and Improvements 10,396      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 18,938      
Accumulated Depreciation (2,837)      
Carrabba's [Member] | Scottsdale, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,350      
Buildings, Fixtures and Improvements 1,847      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,197      
Accumulated Depreciation (398)      
Carrabba's [Member] | Louisville, CO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,083      
Buildings, Fixtures and Improvements 1,400      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,483      
Accumulated Depreciation (407)      
Carrabba's [Member] | Tampa, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,650      
Buildings, Fixtures and Improvements 2,085      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,735      
Accumulated Depreciation (632)      
Carrabba's [Member] | Duluth, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 836      
Buildings, Fixtures and Improvements 2,881      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,717      
Accumulated Depreciation (849)      
Carrabba's [Member] | Bowie, MD [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,429      
Buildings, Fixtures and Improvements 1,036      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,465      
Accumulated Depreciation (563)      
Carrabba's [Member] | Brooklyn, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,187      
Buildings, Fixtures and Improvements 2,212      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,399      
Accumulated Depreciation (619)      
Carrabba's [Member] | Washington Township, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 906      
Buildings, Fixtures and Improvements 1,859      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,765      
Accumulated Depreciation (568)      
Carrabba's [Member] | Columbia, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,159      
Buildings, Fixtures and Improvements 2,164      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,323      
Accumulated Depreciation (626)      
Carrabba's [Member] | Johnson City, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 771      
Buildings, Fixtures and Improvements 2,536      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,307      
Accumulated Depreciation (795)      
Cashland [Member] | Celina, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 108      
Buildings, Fixtures and Improvements 132      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 240      
Accumulated Depreciation (41)      
Castle Dental [Member] | Murfreesboro, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 256      
Buildings, Fixtures and Improvements 256      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 512      
Accumulated Depreciation (80)      
Cequent [Member] | Mosinee, WI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,416      
Buildings, Fixtures and Improvements 3,259      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 4,675      
Accumulated Depreciation (499)      
Change Healthcare Operations [Member] | Nashville, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 4,700      
Land 688      
Buildings, Fixtures and Improvements 10,417      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 11,105      
Accumulated Depreciation (2,126)      
Charleston's [Member] | Carmel, IN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 140      
Buildings, Fixtures and Improvements 3,016      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,156      
Accumulated Depreciation (908)      
Checkers [Member] | Tampa, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 736      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 736      
Accumulated Depreciation 0      
Checkers [Member] | Huntsville, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 689      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 689      
Accumulated Depreciation 0      
Checkers [Member] | Hollywood, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 160      
Buildings, Fixtures and Improvements 2,220      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,380      
Accumulated Depreciation (668)      
Checkers [Member] | Jacksonville, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 731      
Buildings, Fixtures and Improvements 1,096      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,827      
Accumulated Depreciation (308)      
Checkers [Member] | Lauderhill, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 280      
Buildings, Fixtures and Improvements 1,951      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,231      
Accumulated Depreciation (587)      
Checkers [Member] | Miami, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 621      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 621      
Accumulated Depreciation 0      
Checkers [Member] | Orlando, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,033      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,033      
Accumulated Depreciation 0      
Checkers [Member] | Plantation, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 220      
Buildings, Fixtures and Improvements 1,461      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,681      
Accumulated Depreciation (440)      
Checkers [Member] | Fayetteville, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 681      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 681      
Accumulated Depreciation 0      
Chedder's Casual Cafe [Member] | Bolingbrook, IL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,344      
Buildings, Fixtures and Improvements 1,760      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,104      
Accumulated Depreciation (534)      
Chedder's Casual Cafe [Member] | Lubbock, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,053      
Buildings, Fixtures and Improvements 2,345      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,398      
Accumulated Depreciation (712)      
Chevy's [Member] | Miami, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,455      
Buildings, Fixtures and Improvements 783      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,238      
Accumulated Depreciation (244)      
Chevy's [Member] | Greenbelt, MD [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 530      
Buildings, Fixtures and Improvements 2,399      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,929      
Accumulated Depreciation (722)      
Children's Courtyard [Member] | Grand Prairie, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 367      
Buildings, Fixtures and Improvements 1,055      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,422      
Accumulated Depreciation (277)      
Childtime Childcare [Member] | Oklahoma City, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 124      
Buildings, Fixtures and Improvements 796      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 920      
Accumulated Depreciation (222)      
Childtime Childcare [Member] | Modesto, CA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 280      
Buildings, Fixtures and Improvements 1,524      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,804      
Accumulated Depreciation (387)      
Childtime Childcare [Member] | Bedford, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 111      
Buildings, Fixtures and Improvements 852      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 963      
Accumulated Depreciation (240)      
Childtime Childcare [Member] | Oklahoma City, OK 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 108      
Buildings, Fixtures and Improvements 793      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 901      
Accumulated Depreciation (214)      
Chili's [Member] | East Peoria, IL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,023      
Buildings, Fixtures and Improvements 2,347      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,370      
Accumulated Depreciation (713)      
Chili's [Member] | Flanders, NJ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 1,508      
Land 1,402      
Buildings, Fixtures and Improvements 842      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,244      
Accumulated Depreciation (398)      
Chili's [Member] | Mt. Laurel, NJ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 1,447      
Land 1,332      
Buildings, Fixtures and Improvements 1,792      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,124      
Accumulated Depreciation (360)      
Chili's [Member] | Amarillo, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 811      
Buildings, Fixtures and Improvements 1,893      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,704      
Accumulated Depreciation (590)      
China Buffet [Member] | Alvin, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 110      
Buildings, Fixtures and Improvements 299      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 409      
Accumulated Depreciation (91)      
China Buffet [Member] | Angleton, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 127      
Buildings, Fixtures and Improvements 272      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 399      
Accumulated Depreciation (82)      
China Town Buffet [Member] | Bismarck, ND [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 1,038      
Buildings, Fixtures and Improvements 1,928      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,966      
Accumulated Depreciation (601)      
Chipper's Grill [Member] | Streator, IL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 190      
Buildings, Fixtures and Improvements 255      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 445      
Accumulated Depreciation (77)      
Church's Chicken [Member] | Columbia, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 437      
Buildings, Fixtures and Improvements 437      
Costs Capitalized Subsequent to Acquisition (486)      
Gross Amount Carried at December 31, 2018 388      
Accumulated Depreciation (6)      
Church's Chicken [Member] | Orlando, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 254      
Buildings, Fixtures and Improvements 380      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 634      
Accumulated Depreciation (107)      
Church's Chicken [Member] | Atmore, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 144      
Buildings, Fixtures and Improvements 574      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 718      
Accumulated Depreciation (161)      
Church's Chicken [Member] | Bay Minette, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 134      
Buildings, Fixtures and Improvements 757      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 891      
Accumulated Depreciation (212)      
Church's Chicken [Member] | Flomaton, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 173      
Buildings, Fixtures and Improvements 518      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 691      
Accumulated Depreciation (145)      
Church's Chicken [Member] | Jackson, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 127      
Buildings, Fixtures and Improvements 719      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 846      
Accumulated Depreciation (202)      
Church's Chicken [Member] | Augusta, GA 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 256      
Buildings, Fixtures and Improvements 597      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 853      
Accumulated Depreciation (167)      
Church's Chicken [Member] | Augusta, GA 4 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 196      
Buildings, Fixtures and Improvements 458      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 654      
Accumulated Depreciation (128)      
Church's Chicken [Member] | Charleston, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 421      
Buildings, Fixtures and Improvements 344      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 765      
Accumulated Depreciation (97)      
Church's Chicken [Member] | Charleston, SC 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 500      
Buildings, Fixtures and Improvements 167      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 667      
Accumulated Depreciation (47)      
Church's Chicken [Member] | Columbia, SC 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 231      
Buildings, Fixtures and Improvements 428      
Costs Capitalized Subsequent to Acquisition (393)      
Gross Amount Carried at December 31, 2018 266      
Accumulated Depreciation (6)      
Church's Chicken [Member] | Greenville, SC 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 254      
Buildings, Fixtures and Improvements 472      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 726      
Accumulated Depreciation (132)      
Church's Chicken [Member] | Greenville, SC 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 325      
Buildings, Fixtures and Improvements 487      
Costs Capitalized Subsequent to Acquisition (458)      
Gross Amount Carried at December 31, 2018 354      
Accumulated Depreciation (7)      
Church's Chicken [Member] | North Charleston, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 302      
Buildings, Fixtures and Improvements 302      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 604      
Accumulated Depreciation (85)      
Church's Chicken [Member] | North Charleston, SC 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 407      
Buildings, Fixtures and Improvements 407      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 814      
Accumulated Depreciation (114)      
Church's Chicken [Member] | Orangeburg, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 407      
Buildings, Fixtures and Improvements 271      
Costs Capitalized Subsequent to Acquisition (299)      
Gross Amount Carried at December 31, 2018 379      
Accumulated Depreciation (5)      
Church's Chicken [Member] | Spartanburg, SC 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 350      
Buildings, Fixtures and Improvements 525      
Costs Capitalized Subsequent to Acquisition (431)      
Gross Amount Carried at December 31, 2018 444      
Accumulated Depreciation (9)      
Chuze Fitness [Member] | Highlands Ranch, CO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 2,850      
Buildings, Fixtures and Improvements 4,795      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 7,645      
Accumulated Depreciation (1,168)      
Cigna [Member] | Phoenix, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 6,194      
Buildings, Fixtures and Improvements 16,215      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 22,409      
Accumulated Depreciation (3,797)      
Cigna [Member] | Plano, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 10,036      
Buildings, Fixtures and Improvements 42,676      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 52,712      
Accumulated Depreciation (10,111)      
Circle K [Member] | Phoenix, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 344      
Buildings, Fixtures and Improvements 1,377      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,721      
Accumulated Depreciation (450)      
Circle K [Member] | Martinez, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 348      
Buildings, Fixtures and Improvements 813      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,161      
Accumulated Depreciation (260)      
Circle K [Member] | Martinez, GA 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 293      
Buildings, Fixtures and Improvements 329      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 622      
Accumulated Depreciation (80)      
Circle K [Member] | Thomson, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 637      
Buildings, Fixtures and Improvements 340      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 977      
Accumulated Depreciation (86)      
Circle K [Member] | Akron, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 675      
Buildings, Fixtures and Improvements 1,254      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,929      
Accumulated Depreciation (398)      
Citizens Bank [Member] | Colchester, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 185      
Buildings, Fixtures and Improvements 1,049      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,234      
Accumulated Depreciation (319)      
Citizens Bank [Member] | Deep River, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 453      
Buildings, Fixtures and Improvements 1,812      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,265      
Accumulated Depreciation (550)      
Citizens Bank [Member] | East Lyme, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 258      
Buildings, Fixtures and Improvements 1,032      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,290      
Accumulated Depreciation (313)      
Citizens Bank [Member] | Hamden, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 581      
Buildings, Fixtures and Improvements 475      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,056      
Accumulated Depreciation (144)      
Citizens Bank [Member] | Higganum, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 171      
Buildings, Fixtures and Improvements 971      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,142      
Accumulated Depreciation (358)      
Citizens Bank [Member] | Montville, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 413      
Buildings, Fixtures and Improvements 2,342      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,755      
Accumulated Depreciation (711)      
Citizens Bank [Member] | Stonington, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 190      
Buildings, Fixtures and Improvements 1,079      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,269      
Accumulated Depreciation (328)      
Citizens Bank [Member] | Lewes, DE [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 102      
Buildings, Fixtures and Improvements 916      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,018      
Accumulated Depreciation (267)      
Citizens Bank [Member] | Wilmington, DE 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 299      
Buildings, Fixtures and Improvements 299      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 598      
Accumulated Depreciation (94)      
Citizens Bank [Member] | Ludlow, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 810      
Buildings, Fixtures and Improvements 540      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,350      
Accumulated Depreciation (164)      
Citizens Bank [Member] | Malden, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 488      
Buildings, Fixtures and Improvements 596      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,084      
Accumulated Depreciation (181)      
Citizens Bank [Member] | Malden, MA 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 1,697      
Land 484      
Buildings, Fixtures and Improvements 1,935      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,419      
Accumulated Depreciation (587)      
Citizens Bank [Member] | Medford, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 1,194      
Land 589      
Buildings, Fixtures and Improvements 1,094      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,683      
Accumulated Depreciation (332)      
Citizens Bank [Member] | Milton, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 2,244      
Land 619      
Buildings, Fixtures and Improvements 2,476      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,095      
Accumulated Depreciation (735)      
Citizens Bank [Member] | New Bedford, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 297      
Buildings, Fixtures and Improvements 694      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 991      
Accumulated Depreciation (211)      
Citizens Bank [Member] | Randolph, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 1,383      
Land 480      
Buildings, Fixtures and Improvements 1,439      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,919      
Accumulated Depreciation (437)      
Citizens Bank [Member] | Somerville, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 561      
Buildings, Fixtures and Improvements 561      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,122      
Accumulated Depreciation (170)      
Citizens Bank [Member] | South Dennis, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 0      
Buildings, Fixtures and Improvements 1,294      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,294      
Accumulated Depreciation (384)      
Citizens Bank [Member] | Springfield, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 187      
Buildings, Fixtures and Improvements 747      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 934      
Accumulated Depreciation (213)      
Citizens Bank [Member] | Winthrop, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 390      
Buildings, Fixtures and Improvements 724      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,114      
Accumulated Depreciation (220)      
Citizens Bank [Member] | Woburn, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 350      
Buildings, Fixtures and Improvements 816      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,166      
Accumulated Depreciation (242)      
Citizens Bank [Member] | Clinton Township, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 574      
Buildings, Fixtures and Improvements 3,250      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 3,824      
Accumulated Depreciation (1,205)      
Citizens Bank [Member] | Dearborn, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 434      
Buildings, Fixtures and Improvements 2,461      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,895      
Accumulated Depreciation (861)      
Citizens Bank [Member] | Dearborn, MI 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 385      
Buildings, Fixtures and Improvements 2,184      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,569      
Accumulated Depreciation (764)      
Citizens Bank [Member] | Farmington, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 303      
Buildings, Fixtures and Improvements 707      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,010      
Accumulated Depreciation (210)      
Citizens Bank [Member] | Grosse Pointe, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 410      
Buildings, Fixtures and Improvements 2,322      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,732      
Accumulated Depreciation (849)      
Citizens Bank [Member] | Lathrup Village, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 283      
Buildings, Fixtures and Improvements 1,602      
Costs Capitalized Subsequent to Acquisition (1,227)      
Gross Amount Carried at December 31, 2018 658      
Accumulated Depreciation (8)      
Citizens Bank [Member] | Livonia, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 261      
Buildings, Fixtures and Improvements 1,476      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,737      
Accumulated Depreciation (550)      
Citizens Bank [Member] | Richmond, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 168      
Buildings, Fixtures and Improvements 951      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,119      
Accumulated Depreciation (354)      
Citizens Bank [Member] | St. Clair Shores, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 309      
Buildings, Fixtures and Improvements 1,748      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 2,057      
Accumulated Depreciation (651)      
Citizens Bank [Member] | Troy, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 312      
Buildings, Fixtures and Improvements 935      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,247      
Accumulated Depreciation (277)      
Citizens Bank [Member] | Warren, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2018 0      
Land 178      
Buildings, Fixtures and Improvements 1,009      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2018 1,187      
Accumulated Depreciation $ (372)