Organization (Details) ft² in Millions	12 Months Ended
Dec. 31, 2021 ft² a property segment
Real Estate
Number of markets \| segment	6
Number of properties (property)	253
Buildings
Real Estate
Number of properties (property)	253
Improved land parcels
Real Estate
Number of properties (property)	36
Area of real estate property \| ft²	15.1
Area of land \| a	127.1
Improved land parcels \| Scenario, Plan
Real Estate
Number of properties (property)	2
Area of land \| a	12.1
Redevelopment property
Real Estate
Number of properties (property)	4
Redevelopment property \| Scenario, Plan
Real Estate
Number of properties (property)	2
Area of real estate property \| ft²	0.2

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration