Description Of Business And Segment Reporting (Summary Of Results Of Operations For Principal Business Segments) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue		$ 66,149	$ 57,788	$ 72,802	$ 60,584	$ 61,742	$ 65,031	$ 69,922	$ 58,053	$ 257,323	$ 254,748	[1]	$ 258,221	[1]
Cost of services and products										(200,955)	(198,205)		(204,036)
Depreciation and amortization										(14,562)	(15,468)	[1]	(15,197)	[1]
General and administrative										(18,652)	(18,902)	[1]	(18,053)	[1]
Total costs and expenses										(234,169)	(232,575)	[1]	(237,286)	[1]
Operating income										23,154	22,173	[1]	20,935	[1]
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue										263,860	262,209		265,874
Cost of services and products										(207,492)	(205,666)		(211,689)
Depreciation and amortization										(14,268)	(15,108)		(14,764)
Total costs and expenses										(218,951)	(217,930)		(222,717)
Operating income										38,372	36,818		35,504
Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	[2]									(6,537)	(7,461)		(7,653)
Total costs and expenses	[2]									(6,537)	(7,461)		(7,653)
Cinema [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue										242,281	237,861		239,418
Cost of services and products										(196,544)	(195,896)		(200,859)
Cinema [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue										242,281	237,861		239,418
Cost of services and products										(196,544)	(195,896)		(200,859)
Depreciation and amortization										(11,161)	(11,047)		(10,741)
Total costs and expenses										(210,705)	(210,518)		(214,873)
Operating income										31,576	27,343		24,545
Real Estate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue										21,579	24,348		26,456
Cost of services and products										(10,948)	(9,770)		(10,830)
Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue										21,579	24,348		26,456
Cost of services and products										(10,948)	(9,770)		(10,830)
Depreciation and amortization										(3,107)	(4,061)		(4,023)
Total costs and expenses										(14,783)	(14,873)		(15,497)
Operating income										6,796	9,475		10,959
Segment [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
General and administrative										(3,728)	(4,617)		(3,917)
Segment [Member] | Cinema [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
General and administrative										(3,000)	(3,575)		(3,273)
Segment [Member] | Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
General and administrative										$ (728)	$ (1,042)		$ (644)

[1] Certain prior period amounts have been reclassified to conform to the current period presentation (see Note 2 - Significant Accounting Policies - Reclassifications).

[2] Inter-segment eliminations relates to the internal charge between the two segments where the cinema operates within real estate owned within the group.