Mortgage and Other Indebtedness Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Fair Value, Net	$ (3,603)	$ (4,007)
Interest Rate Cap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Number of Instruments	0	1
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Number of Instruments	4	4
Derivative, Notional Amount	108,787	109,830
Pay Fixed Receive Variable Swap One [Member]
Derivatives, Fair Value [Line Items]
Amortized amount	48,337
Derivative, outstanding notional amount	52,588
Pay fixed receive variable swap Two [Member]
Derivatives, Fair Value [Line Items]
Amortized amount	30,276
Derivative, outstanding notional amount	32,928
Pay fixed receive variable swap Three [Member]
Derivatives, Fair Value [Line Items]
Amortized amount	11,313
Derivative, outstanding notional amount	12,309
Pay fixed receive variable swap Four [Member]
Derivatives, Fair Value [Line Items]
Amortized amount	10,083
Derivative, outstanding notional amount	10,962
Cash Flow Hedging [Member] | Interest Rate Cap [Member] | Intangible lease assets and other assets [Member]
Derivatives, Fair Value [Line Items]
Designated Benchmark Interest Rate	3-month LIBOR
Strike rate	5.00%
Fair Value, Net		0
Maturity Date	Jan. 01, 2014
Cash Flow Hedging [Member] | Pay Fixed Receive Variable Swap One [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Designated Benchmark Interest Rate	1-month LIBOR
Strike rate	2.149%
Fair Value, Net	(1,722)	(1,915)
Maturity Date	Apr. 30, 2016
Cash Flow Hedging [Member] | Pay fixed receive variable swap Two [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Designated Benchmark Interest Rate	1-month LIBOR
Strike rate	2.187%
Fair Value, Net	(1,102)	(1,226)
Maturity Date	Apr. 30, 2016
Cash Flow Hedging [Member] | Pay fixed receive variable swap Three [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Designated Benchmark Interest Rate	1-month LIBOR
Strike rate	2.142%
Fair Value, Net	(402)	(446)
Maturity Date	Apr. 30, 2016
Cash Flow Hedging [Member] | Pay fixed receive variable swap Four [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Designated Benchmark Interest Rate	1-month LIBOR
Strike rate	2.236%
Fair Value, Net	$ (377)	$ (420)
Maturity Date	Apr. 30, 2016