Debt (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Oct. 31, 2013
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 103,500,000
Line Of Credit Facility Covenant Terms, Fixed Rate Debt and Debt, Subject To Hedge Agreements To Total Debt Minimum, Percentage	66.67%
Line Of Credit Facility Covenant Terms, Secured Recourse Debt Ratio, Maximum, Percentage	20.00%
Line Of Credit Facility Covenant Terms, Tangible Minimum	330,788,250
Line Of Credit Facility Covenant Terms, Percentage Of Net Proceeds Of Additional Equity Issuances	75.00%
Line Of Credit Facility Covenant Terms, Percentage Of Distributions Of Funds From Operations	95.00%
Line of Credit Facility, Increase, Additional Borrowings	72,500,000	58,000,000
Debt Instrument, Face Amount				100,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.75%
Common Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01
Exchange Settlement [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	1,000,000,000
Debt Conversion, Converted Instrument, Shares Issued	79.602
Common Stock Exchange Price	$ 12.56
Convertible Notes Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	1,000,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01
Debt Instrument Repurchased Principal Percentage	$ 100
Term Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding	50,000,000
Debt Instrument, Interest Rate During Period	2.01%
Minimum [Member]
Debt Instrument [Line Items]
Line Of Credit Facility Covenant Terms, Leverage Ratio, Maximum	0.60
Line Of Credit Facility Covenant Term, Fixed Charge Coverage Ratio, Minimum	1.00
Minimum [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Leverage Ratio For Eurodollar Rate Based Borrowings	1.70%
Leverage Ratio For Base Rate Based Borrowings	0.70%
Maximum [Member]
Debt Instrument [Line Items]
Line Of Credit Facility Covenant Terms, Leverage Ratio, Maximum	1.00
Line Of Credit Facility Covenant Term, Fixed Charge Coverage Ratio, Minimum	1.50
Maximum [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Leverage Ratio For Eurodollar Rate Based Borrowings	2.45%
Leverage Ratio For Base Rate Based Borrowings	1.45%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	15,000,000
Line of Credit Facility, Borrowing Capacity, Description	(a) the lesser of (i) 60.0% of the "as-is" appraised value of our properties that form the borrowing base of the Amended Credit Facility and (ii) the amount that would create a debt service coverage ratio of not less than 1.5, and (b) 50% of the aggregate of the lesser of (i) the book value of each of our development assets (as such term is defined in the Second Amended and Restated Credit Agreement) and (ii) the "as-is" appraised value of each of our development assets, subject to certain limitations in the Second Amended and Restated Credit Agreement.
Line of Credit Facility, Amount Outstanding	116,000,000
Long Term Line Of Credit	50,000,000
Line of Credit Facility, Increase, Additional Borrowings	250,000,000
Debt Instrument, Interest Rate During Period	2.06%
Description of revolving credit facility , average borrowings, interest rate	(i) of 0.30% per annum if our average borrowing is less than 50.0% of the total amount available or (ii) 0.25% per annum if our average borrowing is greater than 50.0% of the total amount available.
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Leverage Ratio For Eurodollar Rate Based Borrowings	1.75%
Leverage Ratio For Base Rate Based Borrowings	0.75%
Future Commitment Line Of Credit Facility Maximum Borrowing Capacity	300,000,000
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage Ratio For Eurodollar Rate Based Borrowings	2.50%
Leverage Ratio For Base Rate Based Borrowings	1.50%
Future Commitment Line Of Credit Facility Maximum Borrowing Capacity	600,000,000
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 30,000,000