Commitments and Contingencies UNL Construction (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 parkingstalls
Construction in Progress [Member]
Operating Leases, Rent Expense	$ 100
Number of Parking Stalls	1,605
Estimated Total Cost of Construction	34,000,000
Possible Penalty on Construction	6,000
Construction in Progress [Member] | 3 year term [Member]
Estimated Debt of Construction	25,500,000
Construction in Progress [Member] | 5 year term [Member]
Debt Instrument, Interest Rate, Stated Percentage	4.70%
Estimated Debt of Construction	4,300,000
Construction in Progress [Member]
Operating Leases, Rent Expense	100
Number of Parking Stalls	1,605
Number of Units in Real Estate Property	475
Estimated Total Cost of Construction	34,000,000
Estimated Debt of Construction	29,800,000
Proceeds from Construction Loans Payable	$ 1,800,000