Other Assets And Deferred Charges, Net (Components Of Other Assets And Deferred Charges, Net) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Deferred Costs And Other Assets [Line Items]
Lease origination costs	$ 21,623,000	$ 19,343,000
Interest rate swaps	8,871,000	6,394,000
Prepaid expenses	5,790,000	5,377,000
Unsecured revolving credit facility financing costs	3,536,000
Leasehold improvements, furniture and fixtures	359,000	393,000
Investments related to deferred compensation liabilities	616,000	552,000
Other	1,756,000	1,084,000
Total other assets and deferred charges, net	40,642,000	35,350,000
Intangible Lease Assets [Member]
Deferred Costs And Other Assets [Line Items]
Deferred charges, net	7,500,000	8,300,000
Cost of intangible lease assets	19,900,000	20,500,000
Accumulated amortization of intangible lease assets	12,400,000	12,200,000
Unsecured Revolving Credit Facility [Member]
Deferred Costs And Other Assets [Line Items]
Unsecured revolving credit facility financing costs	1,627,000	$ 2,207,000
Accumulated amortization of intangible lease assets	$ 29,800,000