Assets classified as held for sale (Details) $ in Thousands	Mar. 31, 2023 USD ($) ft² property	Dec. 31, 2022 USD ($)
Net assets held for sale [Abstract]
Total assets	$ 117,598	$ 117,197
Total liabilities	(1,688)	(2,034)
Total accumulated other comprehensive income	761	898
Net assets classified as held for sale	$ 116,671	$ 116,061
Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties held for sale | property	10
Assets held for sale - area of real estate | ft²	297,284
Non-core submarket
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties held for sale | property	8
Assets held for sale - area of real estate | ft²	128,870
China Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties held for sale | property	1
Assets held for sale - area of real estate | ft²	334,144