Other Assets And Deferred Charges, Net (Components Of Other Assets And Deferred Charges, Net) (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Deferred Costs And Other Assets [Line Items]
Lease origination costs	$ 17,717,000	$ 18,394,000
Unsecured revolving credit facility financing costs	3,210,000
Prepaid expenses	4,872,000	6,104,000
Leasehold improvements, furniture and fixtures	431,000	532,000
Investments related to deferred compensation liabilities	447,000	539,000
Interest rate swaps	3,074,000
Other	1,411,000	1,339,000
Total other assets and deferred charges, net	29,506,000	29,196,000
Intangible Lease Assets [Member]
Deferred Costs And Other Assets [Line Items]
Deferred charges, net	8,400,000	8,000,000
Cost of intangible lease assets	20,000,000	21,300,000
Accumulated amortization of intangible lease assets	11,700,000	13,300,000
Unsecured Revolving Credit Facility [Member]
Deferred Costs And Other Assets [Line Items]
Unsecured revolving credit facility financing costs	1,554,000	$ 2,288,000
Accumulated amortization of intangible lease assets	$ 24,700,000