Borrowings (Summary Of Notes Payable) (Details) - USD ($) $ in Thousands							12 Months Ended
		Oct. 11, 2018	Dec. 29, 2016	Dec. 13, 2016	Aug. 31, 2016	Mar. 03, 2016	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Debt Instrument [Line Items]
Contractual Facility							$ 252,929		$ 271,732
Balance Gross							167,043		134,501
Balance Net							162,740	[1]	130,525	[2]
Deferred financing costs, net							$ 4,300		$ 4,000
Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Maturity date							Apr. 30, 2027		Apr. 30, 2027
Contractual Facility		$ 1,600					$ 27,913		$ 27,913
Balance Gross							27,913		27,913
Balance Net							$ 26,061	[1]	$ 27,554	[2]
Stated Interest Rate							6.52%		5.38%
Effective interest rate							6.52%	[3]	5.38%	[4]
Bank Of America Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date							May 01, 2020		Nov. 28, 2019
Contractual Facility						$ 55,000	$ 55,000		$ 55,000
Balance Gross							25,000		31,000
Balance Net							$ 25,000	[1]	$ 31,000	[2]
Stated Interest Rate							5.02%		4.57%
Effective interest rate							5.02%	[3]	4.57%	[4]
US Bank Of America Line Of Credit [Member]
Debt Instrument [Line Items]
Maturity date							Oct. 31, 2019		Oct. 31, 2019
Contractual Facility							$ 5,000		$ 5,000
Stated Interest Rate							5.48%		4.57%
Effective interest rate							5.48%	[3]	4.57%	[4]
US Bank Of America Digital Projector Loan [Member]
Debt Instrument [Line Items]
Maturity date							Dec. 28, 2019
Contractual Facility							$ 2,604
Balance Gross							2,604
Balance Net	[1]						$ 2,604
Stated Interest Rate							5.00%
Effective interest rate	[3]						5.00%
US Cinema 1, 2, 3 Term Loan [Member]
Debt Instrument [Line Items]
Maturity date							Sep. 01, 2019		Sep. 01, 2019
Contractual Facility					$ 15,000		$ 19,086		$ 19,500		$ 20,000
Balance Gross							19,086		19,500
Balance Net							$ 18,838	[1]	$ 19,105	[2]
Stated Interest Rate							3.25%		3.25%
Effective interest rate							3.25%	[3]	3.25%	[4]
Minetta And Orpheum Theatres Loan [Member]
Debt Instrument [Line Items]
Maturity date							Nov. 01, 2023		Jun. 01, 2018
Contractual Facility							$ 8,000		$ 7,500
Balance Gross							8,000		7,500
Balance Net							$ 7,857	[1]	$ 7,470	[2]
Stated Interest Rate							4.88%		4.13%
Effective interest rate							4.88%	[3]	4.13%	[4]
U.S. Corporate Office Term Loan [Member]
Debt Instrument [Line Items]
Maturity date							Jan. 01, 2027		Jan. 01, 2027
Contractual Facility				$ 8,400			$ 9,495		$ 9,719
Balance Gross							9,495		9,719
Balance Net							$ 9,373	[1]	$ 9,582	[2]
Effective interest rate							4.61%	[3]	4.61%	[4]
Union Square Construction Financing [Member]
Debt Instrument [Line Items]
Maturity date							Dec. 29, 2019
Contractual Facility			$ 57,500				$ 57,500
Balance Gross							27,182
Balance Net	[1]						$ 25,280
Effective interest rate	[3]						8.35%
US Union Square Theatre Term Loan [Member]
Debt Instrument [Line Items]
Maturity date									Dec. 29, 2019
Contractual Facility									$ 57,500
Balance Gross									8,000
Balance Net	[2]								$ 5,033
Stated Interest Rate									5.81%
Effective interest rate	[4]								5.81%
NAB Corporate Term Loan [Member]
Debt Instrument [Line Items]
Maturity date							Dec. 31, 2023	[5]	Jun. 30, 2019	[6]
Contractual Facility							$ 46,856	[5]	$ 51,970	[6]
Balance Gross							37,696	[5]	30,869	[6]
Balance Net							$ 37,660	[1],[5]	$ 30,781	[2],[6]
Stated Interest Rate							3.05%	[5]	3.66%	[6]
Effective interest rate							3.05%	[3],[5]	3.66%	[4],[6]
Westpac Bank Corporate (General/Non-construction) Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date							Dec. 31, 2023	[5]	Dec. 31, 2019	[6]
Contractual Facility							$ 21,475	[5]	$ 24,850	[6]
Balance Gross	[5]						10,067
Balance Net	[1],[5]						$ 10,067
Stated Interest Rate							3.80%	[5]	3.70%	[6]
Effective interest rate							3.80%	[3],[5]	3.70%	[4],[6]
Westpac Bank Corporate (Construction) Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	[6]								Dec. 31, 2019
Contractual Facility	[6]								$ 12,780
Stated Interest Rate	[6]								3.70%
Effective interest rate	[4],[6]								3.70%
Minimum [Member] | U.S. Corporate Office Term Loan [Member]
Debt Instrument [Line Items]
Stated Interest Rate							4.44%		4.44%
Minimum [Member] | Union Square Construction Financing [Member]
Debt Instrument [Line Items]
Stated Interest Rate							6.76%
Maximum [Member] | U.S. Corporate Office Term Loan [Member]
Debt Instrument [Line Items]
Stated Interest Rate							4.64%		4.64%
Maximum [Member] | Union Square Construction Financing [Member]
Debt Instrument [Line Items]
Stated Interest Rate							12.51%

[1] Net of deferred financing costs amounting to $4.3 million.

[2] Net of deferred financing costs amounting to $4.0 million.

[3] Both interest rate derivatives associated with the Trust Preferred Securities and Bank of America Credit Facility expired in October 2017 so the effective interest rate no longer applies as of December 31, 2018.

[4] Both interest rate derivatives associated with the Trust Preferred Securities and Bank of America Credit Facility expired in October 2017 so the effective interest rate no longer applies as of December 31, 2017.

[5] The contractual facilities and outstanding balances of the FC-denominated borrowings were translated into U.S. dollars based on exchange rates as of December 31, 2018.

[6] The contractual facilities and outstanding balances of the FC-denominated borrowings were translated into U.S. dollar based on exchange rates as of December 31, 2017.