Debt (Details)		3 Months Ended
	Mar. 26, 2020 USD ($) extension	Mar. 31, 2021 USD ($) extension	Mar. 31, 2021 CAD ($) extension	Mar. 31, 2021 EUR (€) extension	Dec. 31, 2020 USD ($)	Nov. 03, 2020 EUR (€)	Mar. 31, 2020 USD ($)	Mar. 26, 2020 CAD ($) extension	Apr. 26, 2019 USD ($)	Nov. 06, 2018 USD ($)	May 01, 2013 USD ($)
Mortgages, Senior Notes and Term Loans
Debt Instrument [Line Items]
Carrying Amount		$ 2,428,702,000			$ 2,664,218,000
Estimated Fair Value		2,517,554,000			2,827,440,000
Less: unamortized deferred financing costs		(12,474,000)			(15,952,000)
Total debt net of unamortized deferred financing costs		2,416,228,000			2,648,266,000
Mortgage Loans | 2013 Mortgage Loans
Debt Instrument [Line Items]
Carrying Amount		274,927,000			276,693,000
Estimated Fair Value		$ 284,399,000			285,772,000
Face amount of debt											$ 322,000,000.0
Mortgage Loans | Senior note
Debt Instrument [Line Items]
Contractual Interest Rate		3.81%	3.81%	3.81%
Effective Interest Rate as of March 31, 2021		4.14%	4.14%	4.14%
Carrying Amount		$ 172,927,000			174,693,000
Estimated Fair Value		$ 179,179,000			180,807,000
Mortgage Loans | Mezzanine A
Debt Instrument [Line Items]
Contractual Interest Rate		7.38%	7.38%	7.38%
Effective Interest Rate as of March 31, 2021		7.55%	7.55%	7.55%
Carrying Amount		$ 70,000,000			70,000,000
Estimated Fair Value		$ 72,100,000			71,925,000
Mortgage Loans | Mezzanine B
Debt Instrument [Line Items]
Contractual Interest Rate		11.50%	11.50%	11.50%
Effective Interest Rate as of March 31, 2021		11.75%	11.75%	11.75%
Carrying Amount					32,000,000		$ 32,000,000
Estimated Fair Value		$ 33,120,000			33,040,000
Senior Notes | Senior Unsecured Notes
Debt Instrument [Line Items]
Carrying Amount		1,829,750,000			1,866,200,000
Estimated Fair Value		$ 1,910,750,000			2,022,950,000
Senior Notes | Series D 1.62% notes due 2031
Debt Instrument [Line Items]
Contractual Interest Rate		1.62%	1.62%	1.62%		1.62%
Effective Interest Rate as of March 31, 2021		1.67%	1.67%	1.67%
Carrying Amount		$ 469,200,000			488,640,000
Estimated Fair Value		$ 461,576,000			488,640,000
Face amount of debt | €				€ 400,000,000.0		€ 400,000,000.00
Senior Notes | Series E 1.65% notes due 2033
Debt Instrument [Line Items]
Contractual Interest Rate		1.65%	1.65%	1.65%		1.65%
Effective Interest Rate as of March 31, 2021		1.70%	1.70%	1.70%
Carrying Amount		$ 410,550,000			427,560,000
Estimated Fair Value		$ 400,799,000			427,560,000
Face amount of debt | €				€ 350,000,000.0		€ 350,000,000.00
Senior Notes | Series C notes
Debt Instrument [Line Items]
Contractual Interest Rate		4.10%	4.10%	4.10%					4.10%
Effective Interest Rate as of March 31, 2021		4.15%	4.15%	4.15%
Carrying Amount		$ 350,000,000			350,000,000
Estimated Fair Value		$ 375,375,000			400,750,000
Face amount of debt									$ 350,000,000.0
Senior Notes | Series A notes
Debt Instrument [Line Items]
Contractual Interest Rate		4.68%	4.68%	4.68%						4.68%
Effective Interest Rate as of March 31, 2021		4.77%	4.77%	4.77%
Carrying Amount		$ 200,000,000			200,000,000
Estimated Fair Value		$ 224,000,000			231,000,000
Face amount of debt										$ 200,000,000.0
Senior Notes | Series B notes
Debt Instrument [Line Items]
Contractual Interest Rate		4.86%	4.86%	4.86%						4.86%
Effective Interest Rate as of March 31, 2021		4.92%	4.92%	4.92%
Carrying Amount		$ 400,000,000			400,000,000
Estimated Fair Value		449,000,000			475,000,000
Face amount of debt										$ 400,000,000.0
Term Loans | Total 2020 Senior Unsecured Term Loan A Facility
Debt Instrument [Line Items]
Carrying Amount		324,025,000			521,325,000
Estimated Fair Value		$ 322,405,000			518,718,000
Term Loans | 2020 Senior Unsecured Term Loan Tranche A-1
Debt Instrument [Line Items]
Effective Interest Rate as of March 31, 2021		1.43%	1.43%	1.43%
Carrying Amount		$ 125,000,000			325,000,000
Estimated Fair Value		$ 124,375,000			323,375,000
Face amount of debt	$ 125,000,000.0
Term Loans | 2020 Senior Unsecured Term Loan Tranche A-1 | LIBOR
Debt Instrument [Line Items]
Contractual Interest Rate		0.95%
Term Loans | 2020 Senior Unsecured Term Loan Tranche A-2
Debt Instrument [Line Items]
Effective Interest Rate as of March 31, 2021		1.51%	1.51%	1.51%
Carrying Amount		$ 199,025,000			196,325,000
Estimated Fair Value		$ 198,030,000			195,343,000
Face amount of debt			$ 250,000,000.0					$ 250,000,000.0
Term Loans | 2020 Senior Unsecured Term Loan Tranche A-2 | CDOR
Debt Instrument [Line Items]
Contractual Interest Rate		0.95%
Term Loans | 2018 Senior Unsecured Term Loan A Facility
Debt Instrument [Line Items]
Face amount of debt	$ 475,000,000
Revolving Credit Facility | Line of Credit | 2020 Senior Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Effective Interest Rate as of March 31, 2021		1.53%	1.53%	1.53%
Carrying Amount		$ 43,786,000			0			$ 800,000,000
Estimated Fair Value		$ 43,786,000			$ 0
Number of extensions | extension	2	2	2	2				2
Extension term	6 months	6 months