LEASE OBLIGATIONS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Leases, Future Minimum Payments Due [Abstract]
2013	$ 4,248,000
2014	4,174,000
2015	4,362,000
2016	3,256,000
2017	3,256,000
Thereafter	126,425,000
Total	145,721,000
Minimum [Member]
Operating Leased Assets [Line Items]
Period of lease term	20 years
Maximum [Member]
Operating Leased Assets [Line Items]
Period of lease term	71 years
Ground Rent [Member]
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense	3,200,000	2,200,000	3,200,000
Properties Under Development [Member]
Operating Leased Assets [Line Items]
Rent expense capitalized	(800,000)	200,000	(500,000)
White Plains Corporate Office [Member]
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense	$ 1,400,000	$ 1,400,000	$ 1,500,000
Property Subject to Operating Lease [Member]
Operating Leased Assets [Line Items]
Number of properties leased	8