Rego Park II Apartment Tower (Details) (USD $)	3 Months Ended
	Mar. 31, 2015 sqft aptunits	Dec. 31, 2014
Rego Park 2 Property [Abstract]
Development and construction in progress	$ 89,244,000	$ 75,289,000
Rego Park 2 Property [Member] | Property Under Development [Member] | Apartment Tower [Member]
Rego Park 2 Property [Abstract]
Number of units in apartment tower (in units)	312
Area of property (in square feet)	255,000
Estimated Date Of Completion	2015
Estimated Budgeted Cost	125,000,000
Development and construction in progress	$ 87,087,000