Debt (Schedule of Construction Financing) (Details) - US Union Square Construction Financing [Member] $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2017 USD ($) item		Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Facility Limit		$ 57,500
Advanced-to-Date		8,000
Remaining Facility		$ 49,500
Maturity date		Dec. 29, 2019	[1]	Dec. 29, 2019	[2]
Number of extension options | item		2
Extension period		1 year
Tammany Mezz Investor, LLC [Member] | Mezzanine Loan [Member]
Debt Instrument [Line Items]
Facility Limit		$ 7,500
Remaining Facility		$ 7,500
Interest rate	[3]	10.50%
Spread over LIBOR	[3]	10.00%
Maturity date	[4]	Dec. 29, 2019
Bank Of The Ozarks [Member]
Debt Instrument [Line Items]
Facility Limit				$ 8,000
Advanced-to-Date				$ 8,000
Bank Of The Ozarks [Member] | Senior Loans, Including Building And Project Loan [Member]
Debt Instrument [Line Items]
Facility Limit		$ 50,000
Advanced-to-Date		8,000
Remaining Facility		$ 42,000
Interest rate	[3]	4.75%
Spread over LIBOR	[3]	4.25%
Maturity date	[4]	Dec. 29, 2019
Maximum [Member] | New York State [Member]
Debt Instrument [Line Items]
Interest rate		16.00%

[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 completed the negotiation of 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 completed the negotiation of the construction financing for our Union Square redevelopment project, $8.0 million of which was advanced from the total construction loan limit of $57.5 million. The Minetta & Orpheum Theatres Loan will become due within one year. Currently, we are negotiating with our lender to renew this borrowing. Our loan arrangements are presented, net of the deferred financing costs, on the face of our consolidated balance sheet as follows:Dollars in thousandsBalance Sheet CaptionSeptember 30, 2017December 31, 2016Debt - current portion$ 8,084$ 567 Debt - long-term portion 111,939 115,707 Subordinated debt 27,501 27,340 Total borrowings $ 147,524$ 143,614

[3] Not to exceed the New York State maximum lawful borrowing rate, which typically is 16%.

[4] Allowable for up to two (2) extension request options, one (1) year for each extension request.