Debt (U.S. Corporate Office Term Loan) (Narrative) (Details) - USD ($) $ in Thousands			6 Months Ended		12 Months Ended
	Jun. 26, 2017	Dec. 13, 2016	Jun. 30, 2017		Dec. 31, 2016
Debt Instrument [Line Items]
Contractual facility			$ 272,292		$ 266,134
U.S. Corporate Office Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument term		10 years
Contractual facility		$ 8,400	$ 9,825	[1]	$ 8,363	[2]
Interest rate	4.44%	4.64%
Debt increase	$ 1,500

[1] The loan for our Minetta & Orpheum Theatres was obtained from Santander Bank. The term loan for our Cinema 1,2,3 Theatre was refinanced during the third quarter of 2016 with Valley National Bank. The term loan, which is collateralized by our new U.S Corporate Headquarters office building, was obtained with Citizens Asset Finance, Inc. In December 2016, we successfully negotiated the construction financing for our Union Square redevelopment project, $8.0 million of which was advanced from the total construction loan limit of $57.5 million.

[2] The loan for our Minetta & Orpheum Theatres was obtained from Santander Bank. The term loan for our Cinema 1,2,3 Theatre was refinanced during the third quarter of 2016 with Valley National Bank. The term loan, which is collateralized by our new U.S Corporate Headquarters office building, was obtained with Citizens Asset Finance, Inc.. In December 2016, we successfully negotiated the construction financing for our Union Square redevelopment project, $8.0 million of which was advanced from the total construction loan limit of $57.5 million. Our loan arrangements are presented, net of the deferred financing costs, on the face of our consolidated balance sheet as follows:Dollars in thousandsBalance Sheet CaptionJune 30, 2017December 31, 2016Debt - current portion$ 8,058$ 567 Debt - long-term portion 95,091 115,707 Subordinated debt 27,447 27,340 Total borrowings $ 130,596$ 143,614