Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 188,732	$ 183,380	$ 564,919	$ 557,193
Rental property revenues
Disaggregation of Revenue [Line Items]
Revenues	185,515	179,024	552,088	543,252
Variable rental revenue	52,300	47,100	148,300	145,400
Fees and other
Disaggregation of Revenue [Line Items]
Revenues	$ 3,200	$ 4,400	$ 12,800	$ 13,900