Subsequent Events/Other (Details) (USD $)	3 Months Ended				1 Months Ended	3 Months Ended	1 Months Ended			1 Months Ended	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	May 02, 2014 Forward Starting Swaps [Member]	Mar. 31, 2014 Forward Starting Swaps [Member]	May 08, 2014 Secured Debt [Member]	Mar. 31, 2014 Secured Debt [Member]	May 08, 2014 Land [Member]	May 02, 2014 Land [Member]	Mar. 31, 2014 Land [Member]	May 08, 2014 Land Parcel Portion [Member]	Mar. 31, 2013 Other Expense [Member]
Subsequent Event [Line Items]
Land parcels acquired							1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 148,500,000							$ 10,300,000	$ 5,500,000
Proceeds From Sale Of Property										8,200,000
Repayments Of Mortgage Notes Payable	3,034,000	3,244,000			3,100,000	3,000,000
Notional Amount of Hedge Instruments			50,000,000	450,000,000
Write-off of pursuit costs	452,000	2,533,000									2,600,000
Litigation Settlement, Amount	$ 500,000