Derivative Instruments (Narrative) (Details)	12 Months Ended
Dec. 31, 2022 USD ($) segment properties	Dec. 31, 2021 USD ($)
Derivative Liability, Fair Value, Gross Liability	$ 0	$ 4,900,000
Derivative Asset, Fair Value, Gross Asset	11,400,000	$ 0
Number of Interest Rate Swap Agreements Terminated		4
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net		$ 3,200,000
Total	$ 2,810,111,000	2,804,365,000
Swap Termination Extension Period \| segment	2
Net Investment Hedging [Member]
Derivative, Notional Amount	$ 290.0
Cash Flow Hedging [Member]
Estimated amount to be reclassified from accumulated other comprehensive income to other expense in the next twelve months	900,000
Bonds payable, due August 1, 2047
Total	24,995,000	24,995,000
Interest Rate Swap [Member]
Interest Rate Swap Terminated Value, Blend and Extend	1,400,000
Interest Rate Risk [Member]
Estimated amount to be reclassified from accumulated other comprehensive income to other expense in the next twelve months	$ 1,000,000
Cross Currency Swaps October 2024 \| Net Investment Hedging [Member]
Derivative, Forward Exchange Rate	1.28
Derivative, Notional Amount	$ 200.0
Cross Currency Swaps December 2024 \| Net Investment Hedging [Member]
Derivative, Forward Exchange Rate	1.30
Derivative, Notional Amount	$ 90.0
Currency Swap
Number of Canadian properties exposed to foreign currency exchange risk \| properties	6
Currency Swap \| Net Investment Hedging [Member]
Loss on Contract Termination	$ 3,800,000
Maximum [Member]
credit risk related contingent features default on debt amount	$ 50,000,000
Canada, Dollars \| Cross Currency Swaps October 2024
Derivative, Forward Exchange Rate	1.26
Canada, Dollars \| Cross Currency Swaps October 2024 Notional 200.0
Derivative, Forward Exchange Rate	1.28
Canada, Dollars \| Cross Currency Swaps December 2024
Derivative, Forward Exchange Rate	1.30
United States of America, Dollars \| Cross Currency Swaps October 2024
Derivative, Notional Amount	$ 150,000,000.0
Description of Foreign Currency Exposure	10,800,000
United States of America, Dollars \| Cross Currency Swaps October 2024 Notional 200.0
Derivative, Notional Amount	200,000,000.0
Description of Foreign Currency Exposure	4,500,000
United States of America, Dollars \| Cross Currency Swaps December 2024
Derivative, Notional Amount	90,000,000.0
Description of Foreign Currency Exposure	8,100,000
United States of America, Dollars \| Currency Swap
Derivative, Notional Amount	440,000,000.0
Description of Foreign Currency Exposure	$ 23,400,000
interest rate swap 1.3925 percent [Member] \| Interest Rate Swap [Member]
Derivative, Fixed Interest Rate	2.5325%
interest rate swap 1.3925 percent [Member] \| Interest Rate Swap [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Fixed Interest Rate	1.3925%
Terminated Swaps
Derivative, Notional Amount		$ 400,000,000
interest rate swap 2.53 percent \| Interest Rate Swap [Member]
Derivative, Fixed Interest Rate	2.53%
Derivative, Notional Amount	$ 25,000,000.0
interest rate swap 2.53 percent \| Interest Rate Swap [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Derivative, Fixed Interest Rate	2.5325%

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