Pension And Other Liabilities (Narrative) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Aug. 29, 2014
Defined Benefit Plan Disclosure [Line Items]
Total operating property		$ 257,667,000		$ 264,724,000
Current capital lease liability	[1]	5,900,000		5,900,000
Accrued pension costs		4,670,000	[2]	5,228,000	[2]	$ 7,500,000
Beneift obligation, gross		$ 10,200,000
Discount rate		4.25%
Discount term		15 years
Monthly estate payment amount		$ 56,944
Discounted value		2,700,000
Accumulated prior service cost		$ 3,100,000
Accumulated prior service cost amortization period		15 years
Accrued pension costs included in other liabilities		$ 5,400,000		8,100,000
Service cost		$ 0		$ 0
Sutton Hill Capital, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Lease expiration date		Jun. 30, 2020
Purchase option		$ 5,900,000
Total operating property		4,700,000
Current capital lease liability		5,900,000
Chief Executive Officer [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated amortization of prior service cost next fiscal year		207,000
Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued pension costs						$ 7,600,000
Minimum [Member] | Sutton Hill Capital, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Purchase option		$ 100,000

[1] Represents the lease liability of the option associated with the ground lease purchase of the Village East Cinema. See below for more information.

[2] Represents the pension liability associated with the Supplemental Executive Retirement Plan explained below.