Leases - Narrative (Details) $ in Thousands	1 Months Ended	12 Months Ended
	May 31, 2020 USD ($) property	Dec. 31, 2021 USD ($) renewalOption property lease	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Leases [Abstract]
Rental income		$ 520,334	$ 492,262	$ 462,225
Number of properties sold | property	2	5
Sales Price	$ 244,500	$ 188,400	249,500
Gains on sales of investment real estate	$ 68,300	55,940	70,361	$ 25,101
Profit recognized at commencement date			68,282
Interest income			$ 3,007
Approximate Investment in real estate properties subject to outstanding contractual option to purchase		$ 54,700
Number of exercisable purchase options | renewalOption		3
Number of ground leases prepaid | lease		41