Real Estate and Accumulated Depreciation (Details 2)	12 Months Ended
	Dec. 31, 2014
Memphis, TN [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	1986
Depreciable Life (in years)	5 to 27.5
Berwick, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1973-1976
Date Acquired	2010
Depreciable Life (in years)	5 to 27.5
Greenfield Ctr, NY [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1970
Date Acquired	1977
Depreciable Life (in years)	5 to 27.5
Chambersburg, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1963
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Vineland, NJ [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1973
Date Acquired	1986
Depreciable Life (in years)	27.5
Chambersburg, PA 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1955
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Sayre, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Lewistown, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	2011
Depreciable Life (in years)	5 to 27.5
Tiffin, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1968/1987
Date Acquired	2011
Depreciable Life (in years)	27.5
Horseheads, NY [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1970
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Wintersville, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Muncie, IN [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1996
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Columbia, TN [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1988/1992
Date Acquired	2011
Depreciable Life (in years)	5 to 27.5
Cranberry Twp, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1974
Date Acquired	1986
Depreciable Life (in years)	5 to 27.5
Duncansville, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1961
Date Acquired	1979
Depreciable Life (in years)	5 to 27.5
Clifton Park, NY [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972
Date Acquired	1978
Depreciable Life (in years)	5 to 27.5
Millville, NJ [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	1985
Depreciable Life (in years)	5 to 27.5
Cranberry Twp, PA 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	1982
Depreciable Life (in years)	5 to 27.5
Schuylkill Haven, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1969
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Chambersburg, PA 2 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1978
Date Acquired	2012
Depreciable Life (in years)	27.5
Inkerman, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1970
Date Acquired	1992
Depreciable Life (in years)	5 to 27.5
Kutztown, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1971
Date Acquired	1979
Depreciable Life (in years)	5 to 27.5
Nashville, TN [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1967
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Monticello, NY [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972
Date Acquired	1988
Depreciable Life (in years)	5 to 27.5
Navarre, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	1987
Depreciable Life (in years)	5 to 27.5
Cresson, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	2001
Depreciable Life (in years)	5 to 27.5
Taylor, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972
Date Acquired	2010
Depreciable Life (in years)	5 to 27.5
New Middletown, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1957
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Wooster, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1970-1978
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Wooster, OH 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1995
Date Acquired	2013
Depreciable Life (in years)	27.5
Memphis, TN 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1955
Date Acquired	1985
Depreciable Life (in years)	27.5
Avoca, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972
Date Acquired	2010
Depreciable Life (in years)	5 to 27.5
Coxsackie, NY [Member]
Summary of real estate and accumulated depreciation
Date of Construction	N/A
Date Acquired	2005
Depreciable Life (in years)	5 to 27.5
Tunkhannock, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972
Date Acquired	2010
Depreciable Life (in years)	5 to 27.5
Olmsted Falls, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1953/1970
Date Acquired	2012
Depreciable Life (in years)	27.5
West Grove, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1971
Date Acquired	1974
Depreciable Life (in years)	5 to 27.5
Carlisle, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1961
Date Acquired	1969
Depreciable Life (in years)	5 to 27.5
Bloomsburg, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1960's
Date Acquired	2010
Depreciable Life (in years)	5 to 27.5
Belle Vernon, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1973
Date Acquired	1983
Depreciable Life (in years)	5 to 27.5
Marion, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1950
Date Acquired	1986
Depreciable Life (in years)	5 to 27.5
Magnolia, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	1985
Depreciable Life (in years)	5 to 27.5
Somerset, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	2004
Depreciable Life (in years)	27.5
Columbiana, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1983
Date Acquired	2012
Depreciable Life (in years)	27.5
Jackson, NJ [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1969
Date Acquired	1969
Depreciable Life (in years)	5 to 27.5
Athens, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	1996
Depreciable Life (in years)	5 to 27.5
Greensburgh, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1980
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Somerset, PA 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1970
Date Acquired	2010
Depreciable Life (in years)	5 to 27.5
Goodlettsville, TN [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1964
Date Acquired	2011
Depreciable Life (in years)	5 to 27.5
Apollo, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	1995
Depreciable Life (in years)	5 to 27.5
Ephrata, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1969
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Ephrata, PA 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Hamburg, NY [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	1997
Depreciable Life (in years)	5 to 27.5
West Monroe, NY [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	2003
Depreciable Life (in years)	5 to 27.5
Lebanon Tn [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1997
Date Acquired	2006
Depreciable Life (in years)	5 to 27.5
Eatontown, NJ [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1964
Date Acquired	1978
Depreciable Life (in years)	5 to 27.5
Caledonia, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	prior to 1980
Date Acquired	1996
Depreciable Life (in years)	5 to 27.5
Orrville, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1971/1985/1995
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Birch Run, MI [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1976-1977
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Goshen, IN [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1950/1990
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Elkhart, IN [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1996-1997
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Honey Brook, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1970
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Elkhart, IN 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1969
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Orrville, OH 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1968
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Elkhart, IN 2 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1990
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Carlisle, PA 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972-1975
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Nashville, TN 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1954
Date Acquired	2011
Depreciable Life (in years)	5 to 27.5
Eagleville, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1960
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Goshen, IN 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1956/1990
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Olmsted Twp OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1952/1997
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Doylestown, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1959
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Honey Brook, PA 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1970
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Youngstown, NY [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1963
Date Acquired	2013
Depreciable Life (in years)	5 to 27.5
Ravenna, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1972
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Sayre, PA 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1964
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Toronto, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1950-1957
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
New Springfield, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1973
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Lodi, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1965
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Mantua Oh [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1960
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Dublin, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1973
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Bedford, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1960
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Peninsula, OH [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1956
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Clinton, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1987
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Belle Vernon, PA 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1970
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Greensburg, PA 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1968/1980
Date Acquired	2010
Depreciable Life (in years)	5 to 27.5
Ravenna, OH 1 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1969
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Ruffs Dale, PA [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1974
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Ravenna, OH 2 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1960-1970
Date Acquired	2014
Depreciable Life (in years)	5 to 27.5
Ephrata, PA 2 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1961
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5
Ephrata, PA 3 [Member]
Summary of real estate and accumulated depreciation
Date of Construction	1999
Date Acquired	2012
Depreciable Life (in years)	5 to 27.5