Business Combinations (Schedule Of Purchase Price Allocation) (Details) $ in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2019 USD ($)		Dec. 03, 2019 AUD ($)	Dec. 03, 2019 USD ($)		Jan. 30, 2019 AUD ($)	Jan. 30, 2019 USD ($)
Devonport, Tasmania, Australia [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fixtures and equipment	[1]	$ 153						$ 153
Goodwill	[1]	1,225						1,248
Total assets acquired	[1]	1,378						1,401
Net assets acquired		1,378	[1]				$ 1,950	$ 1,401	[1]
Goodwill, Measurement Period Adjustments	[2]	(23)
Total intangible assets acquired, Measurement Period Adjustments	[2]	(23)
Total assets acquired, Measurement Period Adjustments	[2]	$ (23)
State Cinema Hobart, Tasmania, Australia [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fixtures and equipment	[3]				$ 481
Deferred tax	[3]				5
Inventory	[3]				333
Goodwill	[3]				5,617
Total assets acquired	[3]				6,436
Employee liabilities	[3]				(20)
Deferred revenue balances	[3]				(236)
Total liabilities acquired	[3]				(256)
Net assets acquired				$ 9,000	$ 6,180	[3]

[1] The balances were translated into U.S. Dollars based on the applicable exchange rate as of the date of acquisition, January 30, 2019.

[2] The measurement period adjustments relate to finalization of immaterial employee obligations.

[3] The balances were translated into U.S. Dollars based on the applicable exchange rate as of the date of acquisition, December 3, 2019.