Fair Value Disclosures (Assets and Liabilities Measured At Fair Value On A Recurring Basis) (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Long-term Debt	$ 2,805,853		$ 2,804,365
Derivative Liability, Fair Value, Gross Liability	(7,600)		(4,900)
Derivative Asset, Fair Value, Gross Asset	600		0
Financing Receivable, after Allowance for Credit Loss, Current	370,021		370,159
Real Estate Investment Property, Net	4,738,887		4,713,091
Other assets	$ 76,950		$ 69,918
Number of impaired properties	1		2
Asset Impairment Charges	$ 4,351	$ 0	$ 2,700
Theatre Properties [Member]
Asset Impairment Charges	4,400
Fair Value, Recurring [Member] | Cross Currency Swaps [Member]
Derivative Liability, Fair Value, Gross Liability	(7,618)		(4,626)
Fair Value, Recurring [Member] | Cross Currency Swaps [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Liability, Fair Value, Gross Liability	(7,618)		(4,626)
Fair Value, Recurring [Member] | Interest Rate Swap [Member]
Derivative Liability, Fair Value, Gross Liability			(262)
Derivative Asset, Fair Value, Gross Asset	(639)
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Liability, Fair Value, Gross Liability			(262)
Derivative Asset, Fair Value, Gross Asset	(639)
Fair Value, Nonrecurring [Member]
Real Estate Investment Property, Net	4,700		6,956
Other assets	0		0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Real Estate Investment Property, Net	4,700		6,956
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Other assets	0		0
Variable Rate Converted to Fixed Rate [Member]
Long-term Debt	25,000		25,000
Fixed Rate Mortgage Notes Receivable Member
Financing Receivable, after Allowance for Credit Loss, Current	$ 370,000		$ 370,200
Mortgage Receivable Weighted Average Interest Rate	9.04%		9.04%
Receivable Interest Rate Stated Percentage Rate Range Minimum	7.01%		7.01%
Receivable Interest Rate Stated Percentage Rate Range Maximum	11.96%		11.96%
Notes Receivable, Fair Value Disclosure	$ 401,900		$ 400,100
Weighted Average Market Rate Used As Discount Factor To Determine Fair Value Of Notes	7.98%		8.05%
Fixed Rate Mortgage Notes Receivable Member | Minimum [Member]
market rate used as discount factor to determine fair value of notes	7.50%		7.50%
Fixed Rate Mortgage Notes Receivable Member | Maximum [Member]
market rate used as discount factor to determine fair value of notes	9.25%		9.25%
Variable Rate Debt Member
Long-term Debt	$ 25,000		$ 25,000
Long-term Debt, Weighted Average Interest Rate, at Point in Time	0.55%		0.15%
Fixed Rate Debt Member
Long-term Debt	$ 2,820,000		$ 2,820,000
Long-term Debt, Weighted Average Interest Rate, at Point in Time	4.34%		4.34%
Long-term Debt, Fair Value	$ 2,750,000		$ 2,930,000
Weighted Average Market Rate Used As Discount Factor To Determine Fair Value Of Debt	4.69%		3.43%
Fixed Rate Debt Member | Minimum [Member]
market rate used as discount factor to determine fair value of debt	4.21%		2.25%
Fixed Rate Debt Member | Maximum [Member]
market rate used as discount factor to determine fair value of debt	4.92%		4.56%