Summary of Significant Accounting Policies - Components of rental income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Property operating income	$ 488,479	$ 453,699	$ 415,142
Single-tenant	26,054	34,828	44,083
Straight-line rent	5,801	3,735	3,000
Rental income	$ 520,334	$ 492,262	$ 462,225