Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Lease revenues	$ 198,109	$ 191,416	$ 217,251
Rental revenues	206,148	199,142	226,350
Parking revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,407	4,207	5,608
Tenant services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 3,632	$ 3,519	$ 3,491