Borrowings (Cinema 1, 2, 3 Term Loan) (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Contractual facility	$ 216,749	$ 227,633
Sutton Hill Properties, LLC [Member]
Debt Instrument [Line Items]
Ownership percentage by parent	75.00%
US Cinema 1, 2, 3 Term Loan [Member]
Debt Instrument [Line Items]
Contractual facility	$ 21,061	$ 22,455
Debt Instrument Floor Interest Rate	7.50
Maturity date	Oct. 01, 2024	Apr. 01, 2023
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | US Cinema 1, 2, 3 Term Loan [Member]
Debt Instrument [Line Items]
Interest rate	3.50%