Fair Value Measurements (Assets Measured and Recorded at Fair Value on a Recurring Basis) (Details)		3 Months Ended		6 Months Ended
		Jun. 30, 2016 USD ($) contract	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) contract	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) contract
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative, Number of Instruments Held | contract		3		3		3
Fair value of interest rate swaps		$ 0		$ 0
Reclassification of net losses on interest rate swaps into interest expense (1)	[1]	(1,510,000)	$ 364,000	(9,315,000)	$ (3,220,000)
Derivative Asset						$ 217,000
Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of interest rate swaps						835,000
Interest Rate Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative, Notional Amount		250,000,000		250,000,000		250,000,000
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of interest rate swaps						835,000
Derivative Instruments in Hedges, Liabilities, at Fair Value		5,639,000		5,639,000		1,991,000
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of interest rate swaps						0
Derivative Instruments in Hedges, Liabilities, at Fair Value		0		0		0
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of interest rate swaps						835,000
Derivative Instruments in Hedges, Liabilities, at Fair Value		5,639,000		5,639,000		1,991,000
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of interest rate swaps						0
Derivative Instruments in Hedges, Liabilities, at Fair Value		0		0		$ 0
Interest Rate Swap [Member] | Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset, Number of Instruments Held | contract						1
Interest Rate Swap [Member] | Accounts Payable and Accrued Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Instruments and Hedges, Liabilities		5,600,000		5,600,000		$ 2,000,000
Equity One, Inc. [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		(616,000)		(7,400,000)
Unsecured Debt [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Senior Notes		514,123,000		514,123,000
Senior Notes [Member] | Unsecured Debt [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Senior Notes						$ 515,372,000
Forward Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative, Notional Amount		$ 50,000,000		$ 50,000,000

[1] This amount includes our share of our unconsolidated joint ventures' net unrealized (losses) gains of $(158) and $(450) for the three and six months ended June 30, 2016, respectively, and $163 and $(32) for the same periods during 2015, respectively.