Borrowings (Cinemas 1, 2, 3 Term Loan And Line Of Credit) (Narrative) (Details) $ in Thousands		12 Months Ended
	Aug. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) item		Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Contractual facility		$ 271,732		$ 266,134
Sutton Hill Properties, LLC [Member]
Debt Instrument [Line Items]
Ownership percentage by parent		75.00%
US Cinema 1, 2, 3 Term Loan And Line Of Credit [Member]
Debt Instrument [Line Items]
Contractual facility	$ 15,000	$ 19,500	[1]	$ 19,901	[2]
Maturity date		Sep. 01, 2019	[1]	Sep. 01, 2019	[2]
Interest rate				3.25%
Line of credit facility, maximum borrowing capacity				$ 20,000
Number of extension options | item		1
US Cinema 1, 2, 3 Term Loan And Line Of Credit [Member] | Sutton Hill Properties, LLC [Member]
Debt Instrument [Line Items]
Ownership percentage by parent				75.00%
Contractual facility	$ 15,000

[1] In June 2017 we received $1.5M in additional financing on our new U.S. Corporate Headquarters with Citizens Asset Finance, Inc. due to the reappraisal of the property.

[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.