Mortgage Loans Payable And Unsecured Credit Facilities (Schedule Of Principal Payments On Mortgage Loans Payable And Credit Facility) (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)
Debt Instrument, Gross
2017	$ 3,221,000
2018	3,377,000
2019	150,542,000
2020	103,707,000
2021	100,620,000
Thereafter	248,821,000
Total	610,288,000
Unamortized Premium
2017	119,000
2018	126,000
2019	126,000
2020	126,000
2021	126,000
Thereafter	44,000
Unamortized Premium	667,000
Unamortized Debt Issuance Costs
2017	(759,000)
2018	(759,000)
2019	(607,000)
2020	(391,000)
2021	(259,000)
Thereafter	(435,000)
Unamortized Debt Issuance Costs	(3,210,000)
Debt Instrument, Net
2017	2,581,000
2018	2,744,000
2019	150,061,000
2020	103,442,000
2021	100,487,000
Thereafter	248,430,000
Total	$ 607,745,000
Period of extension option	1 year
Secured Debt [Member]
Debt Instrument, Gross
2017	$ 3,221,000
2018	3,377,000
2019	3,542,000
2020	3,707,000
2021	3,253,000
Thereafter	11,561,000
Total	28,661,000
Secured Debt [Member] | Balloon Payments [Member]
Debt Instrument, Gross
2021	22,367,000
Thereafter	87,260,000
Total	109,627,000
Unsecured Debt [Member] | Revolving Credit Facility [Member]
Debt Instrument, Gross
2019	72,000,000	[1]
Total	72,000,000
Unsecured Debt [Member] | Term Loan [Member]
Debt Instrument, Gross
2019	75,000,000
2020	100,000,000
2021	75,000,000
Thereafter	150,000,000
Total	$ 400,000,000

[1] The revolving credit facility is subject to a one-year extension at the Company's option.