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Share-Based Compensation (Share-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share-Based Payment Arrangement [Abstract]
Share-based compensation cost capitalized	$ 400	$ 800	$ 2,400	$ 3,100
Share-based Payment Arrangement, Expensed, Amount [Line Items]
Share-based compensation expense	13,741	14,595	44,597	47,685
Self-storage cost of operations
Share-based Payment Arrangement, Expensed, Amount [Line Items]
Share-based compensation expense	4,203	4,506	13,740	16,272
Ancillary cost of operations
Share-based Payment Arrangement, Expensed, Amount [Line Items]
Share-based compensation expense	203	342	690	1,122
General and administrative
Share-based Payment Arrangement, Expensed, Amount [Line Items]
Share-based compensation expense	$ 9,335	$ 9,747	$ 30,167	$ 30,291

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Amount of cost capitalized for award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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