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Schedule III - Real Estate and Accumulated Depreciation - Section 5 (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 $ 2,071,038      
Land 2,907,509      
Buildings, Fixtures and Improvements 10,769,845      
Costs Capitalized Subsequent to Acquisition (99,654)      
Gross Amount Carried at December 31, 2017 13,577,700 $ 13,539,921 $ 14,566,343 $ 15,857,507
Accumulated Depreciation (2,217,108) $ (1,766,006) $ (1,331,751) $ (775,050)
Citizens Bank [Member] | Keene, NH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,885      
Land 132      
Buildings, Fixtures and Improvements 2,511      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,643      
Accumulated Depreciation (676)      
Citizens Bank [Member] | Manchester, NH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 640      
Buildings, Fixtures and Improvements 782      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,422      
Accumulated Depreciation (216)      
Citizens Bank [Member] | Manchester, NH 2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 0      
Buildings, Fixtures and Improvements 1,568      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,568      
Accumulated Depreciation (422)      
Citizens Bank [Member] | Pelham, NH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 113      
Buildings, Fixtures and Improvements 340      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 453      
Accumulated Depreciation (98)      
Citizens Bank [Member] | Pittsfield, NH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 160      
Buildings, Fixtures and Improvements 908      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,068      
Accumulated Depreciation (316)      
Citizens Bank [Member] | Rollinsford, NH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 78      
Buildings, Fixtures and Improvements 444      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 522      
Accumulated Depreciation (154)      
Citizens Bank [Member] | Salem, NH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 328      
Buildings, Fixtures and Improvements 1,312      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,640      
Accumulated Depreciation (353)      
Citizens Bank [Member] | Haddon Heights, NJ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 316      
Buildings, Fixtures and Improvements 948      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,264      
Accumulated Depreciation (226)      
Citizens Bank [Member] | Albany, NY [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 232      
Buildings, Fixtures and Improvements 1,315      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,547      
Accumulated Depreciation (432)      
Citizens Bank [Member] | Amherst, NY [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 238      
Buildings, Fixtures and Improvements 1,348      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,586      
Accumulated Depreciation (450)      
Citizens Bank [Member] | East Aurora, NY [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 162      
Buildings, Fixtures and Improvements 919      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,081      
Accumulated Depreciation (307)      
Citizens Bank [Member] | Johnstown, NY [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 163      
Buildings, Fixtures and Improvements 923      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,086      
Accumulated Depreciation (303)      
Citizens Bank [Member] | Port Jervis, NY [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 143      
Buildings, Fixtures and Improvements 811      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 954      
Accumulated Depreciation (275)      
Citizens Bank [Member] | Rochester, NY [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 166      
Buildings, Fixtures and Improvements 943      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,109      
Accumulated Depreciation (315)      
Citizens Bank [Member] | Vails Gate, NY [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 284      
Buildings, Fixtures and Improvements 1,610      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,894      
Accumulated Depreciation (529)      
Citizens Bank [Member] | Whitesboro, NY [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 130      
Buildings, Fixtures and Improvements 739      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 869      
Accumulated Depreciation (243)      
Citizens Bank [Member] | Alliance, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 204      
Buildings, Fixtures and Improvements 1,156      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,360      
Accumulated Depreciation (408)      
Citizens Bank [Member] | Boardman, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 280      
Buildings, Fixtures and Improvements 1,589      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,869      
Accumulated Depreciation (561)      
Citizens Bank [Member] | Broadview Heights, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 201      
Buildings, Fixtures and Improvements 1,140      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,341      
Accumulated Depreciation (386)      
Citizens Bank [Member] | Brunswick, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 186      
Buildings, Fixtures and Improvements 1,057      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,243      
Accumulated Depreciation (373)      
Citizens Bank [Member] | Cleveland, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 239      
Buildings, Fixtures and Improvements 1,357      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,596      
Accumulated Depreciation (479)      
Citizens Bank [Member] | Cleveland, OH 2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 210      
Buildings, Fixtures and Improvements 1,190      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,400      
Accumulated Depreciation (420)      
Citizens Bank [Member] | Cleveland, OH 3 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 182      
Buildings, Fixtures and Improvements 1,031      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,213      
Accumulated Depreciation (364)      
Citizens Bank [Member] | Fairlawn, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,885      
Land 511      
Buildings, Fixtures and Improvements 2,045      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,556      
Accumulated Depreciation (550)      
Citizens Bank [Member] | Lakewood, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 196      
Buildings, Fixtures and Improvements 1,111      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,307      
Accumulated Depreciation (365)      
Citizens Bank [Member] | Louisville, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 191      
Buildings, Fixtures and Improvements 1,080      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,271      
Accumulated Depreciation (381)      
Citizens Bank [Member] | Massillon, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 287      
Buildings, Fixtures and Improvements 1,624      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,911      
Accumulated Depreciation (573)      
Citizens Bank [Member] | Northfield, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 317      
Buildings, Fixtures and Improvements 1,797      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,114      
Accumulated Depreciation (625)      
Citizens Bank [Member] | Parma, OH 2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 475      
Buildings, Fixtures and Improvements 581      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,056      
Accumulated Depreciation (156)      
Citizens Bank [Member] | Parma Heights, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 426      
Buildings, Fixtures and Improvements 638      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,064      
Accumulated Depreciation (172)      
Citizens Bank [Member] | Rocky River, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 283      
Buildings, Fixtures and Improvements 1,602      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,885      
Accumulated Depreciation (526)      
Citizens Bank [Member] | South Russell, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 106      
Buildings, Fixtures and Improvements 957      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,063      
Accumulated Depreciation (257)      
Citizens Bank [Member] | Wadsworth, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 158      
Buildings, Fixtures and Improvements 893      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,051      
Accumulated Depreciation (315)      
Citizens Bank [Member] | Willoughby, OH [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 395      
Buildings, Fixtures and Improvements 2,239      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,634      
Accumulated Depreciation (779)      
Citizens Bank [Member] | Aliquippa, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 138      
Buildings, Fixtures and Improvements 782      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 920      
Accumulated Depreciation (210)      
Citizens Bank [Member] | Allison Park, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 314      
Buildings, Fixtures and Improvements 733      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,047      
Accumulated Depreciation (202)      
Citizens Bank [Member] | Altoona, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 153      
Buildings, Fixtures and Improvements 459      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 612      
Accumulated Depreciation (123)      
Citizens Bank [Member] | Ambridge, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 215      
Buildings, Fixtures and Improvements 1,217      
Costs Capitalized Subsequent to Acquisition (1,282)      
Gross Amount Carried at December 31, 2017 150      
Accumulated Depreciation (4)      
Citizens Bank [Member] | Ashley, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 225      
Buildings, Fixtures and Improvements 675      
Costs Capitalized Subsequent to Acquisition (566)      
Gross Amount Carried at December 31, 2017 334      
Accumulated Depreciation 0      
Citizens Bank [Member] | Beaver Falls, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 138      
Buildings, Fixtures and Improvements 553      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 691      
Accumulated Depreciation (153)      
Citizens Bank [Member] | Butler, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 286      
Buildings, Fixtures and Improvements 1,144      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,430      
Accumulated Depreciation (308)      
Citizens Bank [Member] | Camp Hill, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 430      
Buildings, Fixtures and Improvements 645      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,075      
Accumulated Depreciation (174)      
Citizens Bank [Member] | Carnegie, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 73      
Buildings, Fixtures and Improvements 1,396      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,469      
Accumulated Depreciation (376)      
Citizens Bank [Member] | Dallas, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 213      
Buildings, Fixtures and Improvements 1,205      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,418      
Accumulated Depreciation (332)      
Citizens Bank [Member] | Dillsburg, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 232      
Buildings, Fixtures and Improvements 926      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,158      
Accumulated Depreciation (249)      
Citizens Bank [Member] | Drexel Hill, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 266      
Buildings, Fixtures and Improvements 1,064      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,330      
Accumulated Depreciation (286)      
Citizens Bank [Member] | Erie, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 168      
Buildings, Fixtures and Improvements 671      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 839      
Accumulated Depreciation (181)      
Citizens Bank [Member] | Ford City, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 89      
Buildings, Fixtures and Improvements 802      
Costs Capitalized Subsequent to Acquisition (468)      
Gross Amount Carried at December 31, 2017 423      
Accumulated Depreciation 0      
Citizens Bank [Member] | Glenside, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,257      
Land 343      
Buildings, Fixtures and Improvements 1,370      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,713      
Accumulated Depreciation (340)      
Citizens Bank [Member] | Greensburg, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 45      
Buildings, Fixtures and Improvements 861      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 906      
Accumulated Depreciation (232)      
Citizens Bank [Member] | Havertown, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 219      
Buildings, Fixtures and Improvements 875      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,094      
Accumulated Depreciation (242)      
Citizens Bank [Member] | Highspire, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 216      
Buildings, Fixtures and Improvements 649      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 865      
Accumulated Depreciation (175)      
Citizens Bank [Member] | Homestead, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 202      
Buildings, Fixtures and Improvements 807      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,009      
Accumulated Depreciation (223)      
Citizens Bank [Member] | Kingston, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 404      
Buildings, Fixtures and Improvements 943      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,347      
Accumulated Depreciation (254)      
Citizens Bank [Member] | Kittanning, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 56      
Buildings, Fixtures and Improvements 1,060      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,116      
Accumulated Depreciation (285)      
Citizens Bank [Member] | Lancaster, PA 2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 383      
Buildings, Fixtures and Improvements 468      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 851      
Accumulated Depreciation (129)      
Citizens Bank [Member] | Latrobe, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 148      
Buildings, Fixtures and Improvements 591      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 739      
Accumulated Depreciation (159)      
Citizens Bank [Member] | Lower Burrell, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 180      
Buildings, Fixtures and Improvements 722      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 902      
Accumulated Depreciation (194)      
Citizens Bank [Member] | Matamoras, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 509      
Buildings, Fixtures and Improvements 946      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,455      
Accumulated Depreciation (254)      
Citizens Bank [Member] | Mechanicsburg, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,620      
Land 288      
Buildings, Fixtures and Improvements 2,590      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,878      
Accumulated Depreciation (715)      
Citizens Bank [Member] | Mercer, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 105      
Buildings, Fixtures and Improvements 314      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 419      
Accumulated Depreciation (85)      
Citizens Bank [Member] | Milford, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 513      
Buildings, Fixtures and Improvements 769      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,282      
Accumulated Depreciation (207)      
Citizens Bank [Member] | Monesson, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 198      
Buildings, Fixtures and Improvements 1,123      
Costs Capitalized Subsequent to Acquisition (1,222)      
Gross Amount Carried at December 31, 2017 99      
Accumulated Depreciation (2)      
Citizens Bank [Member] | Mount Lebanon, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,577      
Land 215      
Buildings, Fixtures and Improvements 1,939      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,154      
Accumulated Depreciation (535)      
Citizens Bank [Member] | Mountain Top, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 111      
Buildings, Fixtures and Improvements 631      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 742      
Accumulated Depreciation (170)      
Citizens Bank [Member] | Narberth, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 420      
Buildings, Fixtures and Improvements 2,381      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,801      
Accumulated Depreciation (782)      
Citizens Bank [Member] | Oakmont, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 199      
Buildings, Fixtures and Improvements 1,127      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,326      
Accumulated Depreciation (303)      
Citizens Bank [Member] | Oil City, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 110      
Buildings, Fixtures and Improvements 623      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 733      
Accumulated Depreciation (168)      
Citizens Bank [Member] | Philadelphia, PA 2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 127      
Buildings, Fixtures and Improvements 722      
Costs Capitalized Subsequent to Acquisition (543)      
Gross Amount Carried at December 31, 2017 306      
Accumulated Depreciation (24)      
Citizens Bank [Member] | Philadelphia, PA 3 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 266      
Buildings, Fixtures and Improvements 1,065      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,331      
Accumulated Depreciation (287)      
Citizens Bank [Member] | Pitcairn, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 46      
Buildings, Fixtures and Improvements 867      
Costs Capitalized Subsequent to Acquisition (761)      
Gross Amount Carried at December 31, 2017 152      
Accumulated Depreciation 0      
Citizens Bank [Member] | Pittsburgh, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 215      
Buildings, Fixtures and Improvements 1,219      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,434      
Accumulated Depreciation (336)      
Citizens Bank [Member] | Pittsburgh, PA 2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 256      
Buildings, Fixtures and Improvements 767      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,023      
Accumulated Depreciation (212)      
Citizens Bank [Member] | Pittsburgh, PA 3 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 185      
Buildings, Fixtures and Improvements 1,051      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,236      
Accumulated Depreciation (283)      
Citizens Bank [Member] | Pittsburgh, PA 4 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 389      
Buildings, Fixtures and Improvements 1,168      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,557      
Accumulated Depreciation (314)      
Citizens Bank [Member] | Pittsburgh, PA 5 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 146      
Buildings, Fixtures and Improvements 2,770      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,916      
Accumulated Depreciation (745)      
Citizens Bank [Member] | Pittsburgh, PA 6 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,262      
Land 470      
Buildings, Fixtures and Improvements 2,661      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,131      
Accumulated Depreciation (716)      
Citizens Bank [Member] | Pittsburgh, PA 7 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,244      
Land 516      
Buildings, Fixtures and Improvements 1,204      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,720      
Accumulated Depreciation (324)      
Citizens Bank [Member] | Pittsburgh, PA 8 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 206      
Buildings, Fixtures and Improvements 1,852      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,058      
Accumulated Depreciation (498)      
Citizens Bank [Member] | Pittsburgh, PA 9 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 918      
Land 196      
Buildings, Fixtures and Improvements 1,110      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,306      
Accumulated Depreciation (299)      
Citizens Bank [Member] | Pittsburgh, PA 10 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 255      
Buildings, Fixtures and Improvements 1,019      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,274      
Accumulated Depreciation (274)      
Citizens Bank [Member] | Pittsburgh, PA 11 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 268      
Buildings, Fixtures and Improvements 2,413      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,681      
Accumulated Depreciation (649)      
Citizens Bank [Member] | Reading, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 269      
Buildings, Fixtures and Improvements 1,524      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,793      
Accumulated Depreciation (384)      
Citizens Bank [Member] | Reading, PA 2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 267      
Buildings, Fixtures and Improvements 802      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,069      
Accumulated Depreciation (216)      
Citizens Bank [Member] | Temple, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 268      
Buildings, Fixtures and Improvements 626      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 894      
Accumulated Depreciation (173)      
Citizens Bank [Member] | Turtle Creek, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 308      
Buildings, Fixtures and Improvements 923      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,231      
Accumulated Depreciation (255)      
Citizens Bank [Member] | Tyrone, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 146      
Buildings, Fixtures and Improvements 583      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 729      
Accumulated Depreciation (157)      
Citizens Bank [Member] | Upper Darby, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 411      
Buildings, Fixtures and Improvements 617      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,028      
Accumulated Depreciation (166)      
Citizens Bank [Member] | Warrendale, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 611      
Buildings, Fixtures and Improvements 916      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,527      
Accumulated Depreciation (246)      
Citizens Bank [Member] | West Hazleton, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 279      
Buildings, Fixtures and Improvements 2,509      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,788      
Accumulated Depreciation (692)      
Citizens Bank [Member] | Wexford, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 180      
Buildings, Fixtures and Improvements 719      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 899      
Accumulated Depreciation (194)      
Citizens Bank [Member] | Coventry, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 559      
Buildings, Fixtures and Improvements 559      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,118      
Accumulated Depreciation (154)      
Citizens Bank [Member] | Cranston, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 411      
Buildings, Fixtures and Improvements 1,234      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,645      
Accumulated Depreciation (332)      
Citizens Bank [Member] | East Greenwich, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 227      
Buildings, Fixtures and Improvements 680      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 907      
Accumulated Depreciation (183)      
Citizens Bank [Member] | Johnston, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 343      
Buildings, Fixtures and Improvements 1,030      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,373      
Accumulated Depreciation (284)      
Citizens Bank [Member] | N. Providence, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,445      
Land 200      
Buildings, Fixtures and Improvements 1,800      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,000      
Accumulated Depreciation (484)      
Citizens Bank [Member] | N. Providence, RI 2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 223      
Buildings, Fixtures and Improvements 892      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,115      
Accumulated Depreciation (240)      
Citizens Bank [Member] | Providence, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 300      
Buildings, Fixtures and Improvements 899      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,199      
Accumulated Depreciation (242)      
Citizens Bank [Member] | Rumford, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 352      
Buildings, Fixtures and Improvements 654      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,006      
Accumulated Depreciation (176)      
Citizens Bank [Member] | Wakefield, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 517      
Buildings, Fixtures and Improvements 959      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,476      
Accumulated Depreciation (265)      
Citizens Bank [Member] | Warren, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 328      
Buildings, Fixtures and Improvements 609      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 937      
Accumulated Depreciation (168)      
Citizens Bank [Member] | Warwick, RI [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,870      
Buildings, Fixtures and Improvements 8,828      
Costs Capitalized Subsequent to Acquisition 697      
Gross Amount Carried at December 31, 2017 11,395      
Accumulated Depreciation (2,047)      
Citizens Bank [Member] | Middlebury, VT [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 363      
Buildings, Fixtures and Improvements 544      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 907      
Accumulated Depreciation (146)      
Citizens Bank [Member] | St. Albans, VT [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 141      
Buildings, Fixtures and Improvements 798      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 939      
Accumulated Depreciation (271)      
Coborn's Liquor Store [Member] | Stanley, ND [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,163      
Buildings, Fixtures and Improvements 5,037      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 6,200      
Accumulated Depreciation (997)      
Coborn's Liquor Store [Member] | Tioga, ND [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,065      
Buildings, Fixtures and Improvements 4,581      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 5,646      
Accumulated Depreciation (717)      
Comcast [Member] | Englewood, CO [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,490      
Buildings, Fixtures and Improvements 5,060      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 6,550      
Accumulated Depreciation (1,109)      
Community Bank [Member] | Lake Mary, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,230      
Buildings, Fixtures and Improvements 1,504      
Costs Capitalized Subsequent to Acquisition 4      
Gross Amount Carried at December 31, 2017 2,738      
Accumulated Depreciation (340)      
Community Bank [Member] | Whitehall, NY [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 106      
Buildings, Fixtures and Improvements 600      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 706      
Accumulated Depreciation (197)      
CompUSA [Member] | Arlington, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,770      
Land 2,437      
Buildings, Fixtures and Improvements 1,467      
Costs Capitalized Subsequent to Acquisition 127      
Gross Amount Carried at December 31, 2017 4,031      
Accumulated Depreciation (392)      
ConAgra Foods [Member] | Omaha, NE [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 6,451      
Buildings, Fixtures and Improvements 30,697      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 37,148      
Accumulated Depreciation (3,587)      
ConAgra Foods [Member] | Milton, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 16,245      
Land 5,656      
Buildings, Fixtures and Improvements 27,242      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 32,898      
Accumulated Depreciation (4,943)      
Conn's [Member] | Hurst, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 497      
Buildings, Fixtures and Improvements 1,990      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,487      
Accumulated Depreciation (429)      
Cooper Tire & Rubber [Member] | Franklin, IN [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 15,355      
Land 4,438      
Buildings, Fixtures and Improvements 33,994      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 38,432      
Accumulated Depreciation (8,554)      
Cost Plus [Member] | La Quinta, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,211      
Buildings, Fixtures and Improvements 4,786      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 5,997      
Accumulated Depreciation (997)      
County of Yolo, CA [Member] | Woodland, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 2,640      
Buildings, Fixtures and Improvements 13,681      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 16,321      
Accumulated Depreciation (2,679)      
Cracker Barrel [Member] | Braselton, GA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,935      
Land 1,294      
Buildings, Fixtures and Improvements 2,403      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,697      
Accumulated Depreciation (855)      
Cracker Barrel [Member] | Bremen, GA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,677      
Land 1,012      
Buildings, Fixtures and Improvements 2,361      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,373      
Accumulated Depreciation (840)      
Cracker Barrel [Member] | Columbus, GA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 912      
Buildings, Fixtures and Improvements 3,153      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,065      
Accumulated Depreciation (712)      
Cracker Barrel [Member] | Greensboro, NC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,632      
Buildings, Fixtures and Improvements 2,495      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,127      
Accumulated Depreciation (584)      
Cracker Barrel [Member] | Mebane, NC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,514      
Land 1,106      
Buildings, Fixtures and Improvements 2,054      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,160      
Accumulated Depreciation (731)      
Cracker Barrel [Member] | Rocky Mount, NC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,274      
Buildings, Fixtures and Improvements 2,334      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,608      
Accumulated Depreciation (562)      
Cracker Barrel [Member] | Fort Mill, SC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,301      
Buildings, Fixtures and Improvements 2,721      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,022      
Accumulated Depreciation (644)      
Cracker Barrel [Member] | Piedmont, SC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,630      
Buildings, Fixtures and Improvements 2,927      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,557      
Accumulated Depreciation (691)      
Cracker Barrel [Member] | Abilene, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,374      
Buildings, Fixtures and Improvements 2,933      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,307      
Accumulated Depreciation (695)      
Cracker Barrel [Member] | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,725      
Buildings, Fixtures and Improvements 3,005      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,730      
Accumulated Depreciation (668)      
Cracker Barrel [Member] | Sherman, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 557      
Buildings, Fixtures and Improvements 3,744      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,301      
Accumulated Depreciation (847)      
Cracker Barrel [Member] | Bristol, VA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,241      
Buildings, Fixtures and Improvements 1,703      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,944      
Accumulated Depreciation (489)      
Cracker Barrel [Member] | Emporia, VA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,435      
Land 972      
Buildings, Fixtures and Improvements 2,267      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,239      
Accumulated Depreciation (807)      
Cracker Barrel [Member] | Waynesboro, VA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,536      
Buildings, Fixtures and Improvements 1,489      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,025      
Accumulated Depreciation (519)      
Cracker Barrel [Member] | Woodstock, VA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,262      
Land 928      
Buildings, Fixtures and Improvements 2,164      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,092      
Accumulated Depreciation (770)      
Crest Production Services [Member] | Pleasanton, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 519      
Buildings, Fixtures and Improvements 7,949      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 8,468      
Accumulated Depreciation (2,255)      
Crozer-Keystone Health [Member] | Ridley Park, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 681      
Land 0      
Buildings, Fixtures and Improvements 6,114      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 6,114      
Accumulated Depreciation (1,374)      
CVS [Member] | Mechanicsburg, PA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 3,582      
Land 1,155      
Buildings, Fixtures and Improvements 3,465      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,620      
Accumulated Depreciation (1,052)      
CVS [Member] | Franklin, IN [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 310      
Buildings, Fixtures and Improvements 2,787      
Costs Capitalized Subsequent to Acquisition (5)      
Gross Amount Carried at December 31, 2017 3,092      
Accumulated Depreciation (902)      
CVS [Member] | Piedmont, SC [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 836      
Buildings, Fixtures and Improvements 1,206      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,042      
Accumulated Depreciation (249)      
CVS [Member] | San Antonio, TX [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 3,806      
Land 1,996      
Buildings, Fixtures and Improvements 2,993      
Costs Capitalized Subsequent to Acquisition 15      
Gross Amount Carried at December 31, 2017 5,004      
Accumulated Depreciation (757)      
CVS [Member] | Hoover, AL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,239      
Buildings, Fixtures and Improvements 2,890      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,129      
Accumulated Depreciation (802)      
CVS [Member] | Merdianville, AL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,927      
Land 1,045      
Buildings, Fixtures and Improvements 3,057      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,102      
Accumulated Depreciation (721)      
CVS [Member] | Phoenix, AZ [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 5,025      
Land 1,511      
Buildings, Fixtures and Improvements 4,533      
Costs Capitalized Subsequent to Acquisition 4      
Gross Amount Carried at December 31, 2017 6,048      
Accumulated Depreciation (1,146)      
CVS [Member] | Phoenix, AZ 2 [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 3,015      
Land 901      
Buildings, Fixtures and Improvements 2,704      
Costs Capitalized Subsequent to Acquisition 15      
Gross Amount Carried at December 31, 2017 3,620      
Accumulated Depreciation (684)      
CVS [Member] | City of Industry, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,500      
Land 1,224      
Buildings, Fixtures and Improvements 3,202      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,426      
Accumulated Depreciation (651)      
CVS [Member] | Fresno, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 5,045      
Land 1,890      
Buildings, Fixtures and Improvements 4,409      
Costs Capitalized Subsequent to Acquisition 16      
Gross Amount Carried at December 31, 2017 6,315      
Accumulated Depreciation (1,115)      
CVS [Member] | Palmdale, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 5,226      
Land 2,493      
Buildings, Fixtures and Improvements 4,630      
Costs Capitalized Subsequent to Acquisition 17      
Gross Amount Carried at December 31, 2017 7,140      
Accumulated Depreciation (1,171)      
CVS [Member] | Sacramento, CA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 4,724      
Land 2,163      
Buildings, Fixtures and Improvements 4,016      
Costs Capitalized Subsequent to Acquisition 19      
Gross Amount Carried at December 31, 2017 6,198      
Accumulated Depreciation (1,016)      
CVS [Member] | Norwich, CT [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 5,454      
Land 1,998      
Buildings, Fixtures and Improvements 5,995      
Costs Capitalized Subsequent to Acquisition 15      
Gross Amount Carried at December 31, 2017 8,008      
Accumulated Depreciation (1,515)      
CVS [Member] | Dover, DE [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,046      
Land 4,081      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,081      
Accumulated Depreciation 0      
CVS [Member] | Auburndale, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,565      
Land 1,418      
Buildings, Fixtures and Improvements 2,038      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,456      
Accumulated Depreciation (443)      
CVS [Member] | Boca Raton, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,625      
Land 0      
Buildings, Fixtures and Improvements 3,560      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,560      
Accumulated Depreciation (850)      
CVS [Member] | Ft. Myers, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 3,025      
Land 2,335      
Buildings, Fixtures and Improvements 3,502      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 5,837      
Accumulated Depreciation (838)      
CVS [Member] | Gulf Breeze, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,079      
Land 545      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 545      
Accumulated Depreciation 0      
CVS [Member] | Jacksonville, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 3,715      
Land 2,240      
Buildings, Fixtures and Improvements 4,323      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 6,563      
Accumulated Depreciation (951)      
CVS [Member] | Lakeland, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,258      
Land 587      
Buildings, Fixtures and Improvements 2,347      
Costs Capitalized Subsequent to Acquisition 16      
Gross Amount Carried at December 31, 2017 2,950      
Accumulated Depreciation (594)      
CVS [Member] | Naples, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,675      
Land 0      
Buildings, Fixtures and Improvements 4,164      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,164      
Accumulated Depreciation (914)      
CVS [Member] | New Port Richey, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,618      
Land 1,149      
Buildings, Fixtures and Improvements 2,966      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,115      
Accumulated Depreciation (637)      
CVS [Member] | St. Augustine, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 1,264      
Buildings, Fixtures and Improvements 3,674      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,938      
Accumulated Depreciation (804)      
CVS [Member] | St. Cloud, FL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,626      
Land 1,534      
Buildings, Fixtures and Improvements 1,875      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,409      
Accumulated Depreciation (530)      
CVS [Member] | Alpharetta, GA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 572      
Buildings, Fixtures and Improvements 858      
Costs Capitalized Subsequent to Acquisition (12)      
Gross Amount Carried at December 31, 2017 1,418      
Accumulated Depreciation (263)      
CVS [Member] | Ringgold, GA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,948      
Land 1,346      
Buildings, Fixtures and Improvements 2,939      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,285      
Accumulated Depreciation (695)      
CVS [Member] | Stockbridge, GA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 855      
Buildings, Fixtures and Improvements 1,283      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,138      
Accumulated Depreciation (375)      
CVS [Member] | Vidalia, GA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 368      
Buildings, Fixtures and Improvements 1,105      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,473      
Accumulated Depreciation (341)      
CVS [Member] | Northbrook, IL [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 25,155      
Land 3,471      
Buildings, Fixtures and Improvements 41,765      
Costs Capitalized Subsequent to Acquisition 1,112      
Gross Amount Carried at December 31, 2017 46,348      
Accumulated Depreciation (7,467)      
CVS [Member] | Edinburgh, IN [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 420      
Buildings, Fixtures and Improvements 1,530      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 1,950      
Accumulated Depreciation (363)      
CVS [Member] | Evansville, IN [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 1,850      
Land 227      
Buildings, Fixtures and Improvements 3,060      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 3,287      
Accumulated Depreciation (660)      
CVS [Member] | Mishawaka, IN [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,258      
Land 409      
Buildings, Fixtures and Improvements 4,532      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 4,941      
Accumulated Depreciation (989)      
CVS [Member] | Tipton, IN [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 0      
Land 311      
Buildings, Fixtures and Improvements 1,726      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 2,037      
Accumulated Depreciation (408)      
CVS [Member] | Lawrence, KS [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 2,908      
Land 837      
Buildings, Fixtures and Improvements 4,392      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2017 5,229      
Accumulated Depreciation (959)      
CVS [Member] | Mandeville, LA [Member]        
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2017 4,020      
Land 2,385      
Buildings, Fixtures and Improvements 2,915      
Costs Capitalized Subsequent to Acquisition 16      
Gross Amount Carried at December 31, 2017 5,316      
Accumulated Depreciation $ (738)