Disposition of Assets and Other Transactions (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended	1 Months Ended
	Nov. 30, 2013 sqft	Apr. 30, 2013 Southfield MI [Member] sqft	Jul. 31, 2013 Marietta, GA [Member] sqft	Aug. 31, 2013 Ft. Lauderdale [Member] sqft	Aug. 31, 2013 Elmsford, NY [Member] sqft	Sep. 30, 2013 Cherry Hill [Member] sqft
Area of Land	609,000	60,000	77,000	55,000	59,000	150,000
Proceeds from Sale of Buildings	$ 49.2	$ 2.5	$ 2.9	$ 1.9	$ 22.0	$ 4.5