Impact of COVID-19 Pandemic (Details)						3 Months Ended	12 Months Ended
	Apr. 01, 2021 USD ($)	Mar. 05, 2021	Dec. 31, 2020 USD ($) item	Oct. 31, 2020	Aug. 28, 2020	Dec. 31, 2020 USD ($) item	Dec. 31, 2020 USD ($) item subsidiary	Jun. 30, 2020 item	Mar. 24, 2020 item
Number of theatre opened | item								6
Number of parking lot cinemas | item								5
Number of hotels and resorts closed | item									5
Number of hotels and resorts owned | item			8			8	8
Number of hotels re-opened | item								4
Temporary reduction in salary of Company's chairman, president and chief executive officer (as a percent)			50.00%
Number of theatres proposed to re-open			52.00%	66.00%	80.00%
Grants receivable | $			$ 4,913,000			$ 4,913,000	$ 4,913,000
Subsequent Event [Member]
Number of theatres proposed to re-open		69.00%
Payroll Protection Program loans
Number of subsidiaries who received loan | subsidiary							11
Government assistance CARES Act
Grants awarded to company's theatres | $						$ 5,767,000
Number of states grants awarded to company's theatres | item						7
Grants awarded to company's hotels | $						$ 1,188,000
Number of states grants awarded to company's hotels | item						2
Grants reported as an offset to other operating expenses | $							$ 6,955,000
Grants received | $							$ 2,042,000
Grants receivable | $	$ 4,913,000
Government assistance CARES Act | Subsequent Event [Member]
Additional grants awarded from another states | $	$ 1,300,000