Investment in and Advances to Non-Consolidated Entities (Details) (USD $)		1 Months Ended					12 Months Ended		12 Months Ended
	Mar. 31, 2014 sqft	Oct. 31, 2013 Joint Venture [Member]	Sep. 30, 2013 Joint Venture [Member]	Aug. 31, 2013 Baltimore, Maryland [Member] Joint Venture [Member]	Jul. 31, 2013 Long Island City, New York [Member] Joint Venture [Member]	Mar. 31, 2013 Palm Beach Gardens, Florida [Member] Joint Venture [Member]	Dec. 31, 2012 Palm Beach Gardens, Florida [Member] Joint Venture [Member] sqft	Mar. 31, 2014 Palm Beach Gardens, Florida [Member] Joint Venture [Member]	Dec. 31, 2012 Humble, Texas [Member] Joint Venture [Member]	Dec. 31, 2012 Nonrecourse Mortgage [Member] Humble, Texas [Member] Joint Venture [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage		15.00%					36.00%	25.00%	15.00%
Investment in joint venture		$ 39,456,000		$ 5,000,000	$ 8,918,000		$ 29,750,000
Lease Term (Years)		20 years		99 years			15 years		17 years
Advances to Affiliate		18,791,000					12,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.01%								4.70%
Other than temporary impairment on joint venture			925,000
Square Feet	1,247,000						120,000
Distributions Payable to Real Estate Partnerships						2,557,000
Economic Interest in Joint Venture									100.00%
Property Purchase Price									27,750,000
Debt Instrument, Face Amount										$ 15,260,000