Summary of Significant Accounting Policies - Deferred Leasing and Debt Issuance Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Amortization of deferred leasing costs	$ 6,691	$ 5,985	$ 5,216
Deferred sales inducement cost, amortization expense	1,187	902	$ 757
Deferred leasing costs, gross	74,469	59,691
Accumulated amortization of deferred leasing costs	20,586	17,065
Future amortization of deferred leasing costs, excluding those classified as discontinued operations
2022	8,536
2023	7,798
2024	6,739
2025	5,784
2026	5,132
Thereafter	19,894
Deferred financing fees, net	16,120	17,545
Future amortization of deferred financing fees
2022	3,514
2023	2,217
2024	2,155
2025	1,669
2026	1,335
Thereafter	6,276
Unsecured Revolving Credit Facility
Future amortization of deferred leasing costs, excluding those classified as discontinued operations
Deferred financing fees, gross	4,125	4,125
Accumulated amortization of deferred financing fees	$ 3,079	$ 2,069