Notes Payable and Unsecured Credit Facilities Notes Payable Phantom (Details)	12 Months Ended
	Dec. 31, 2013
Variable Income Interest Rate [Member] | Construction Loans [Member]
Debt Instrument, Interest Rate Terms	LIBOR plus 160 basis points
Debt Instrument, Basis Spread on Variable Rate	1.60%
Unsecured Debt [Member] | General Loan [Member]
Debt Instrument, Interest Rate Terms	LIBOR plus 150 basis points
Debt Instrument, Basis Spread on Variable Rate	3.80%
Unsecured Debt [Member] | Term Loan - Unsecured [Member]
Debt Instrument, Basis Spread on Variable Rate	1.45%
Line of Credit [Member]
Line of Credit Facility, Unsecured, Interest Rate Description	LIBOR plus 117.5 basis points
Line of Credit Facility, Unsecured, Annual Facility Fee	22.5 basis points
Line of Credit [Member] | Line of Credit Facility - Unsecured [Member]
Debt Instrument, Basis Spread on Variable Rate	1.175%
Line of Credit Facility, Commitment Fee Percentage	0.225%
Term Loan - Unsecured [Member]
Debt Instrument, Interest Rate Terms	LIBOR plus 145 basis points