RELATED PERSON TRANSACTIONS - Employees (Details) - Related Party - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Employee \| Jason Smith
Related Party Transaction [Line Items]
Total compensation (less than)	$ 0.2	$ 0.2
Employee \| Ethan White
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.1
Employee \| Amberly Thompson
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.1
Employee \| Edward Kim
Related Party Transaction [Line Items]
Total compensation (less than)	$ 0.1	$ 0.1
Employee \| Restricted Stock \| Jason Smith
Related Party Transaction [Line Items]
Granted (in shares)	37,566
Vesting period	2 years
Employee \| Restricted Stock \| Ethan White
Related Party Transaction [Line Items]
Granted (in shares)	1,503	1,252
Vesting period	2 years	2 years
Employee \| Restricted Stock \| Edward Kim
Related Party Transaction [Line Items]
Granted (in shares)	656	516
Vesting period	2 years	2 years
Employee \| Stock Appreciation Rights (SARs) \| Jason Smith
Related Party Transaction [Line Items]
Granted (in shares)	500,000
Vesting period	2 years
Vice President \| Frederick Smith
Related Party Transaction [Line Items]
Total compensation (less than)	$ 0.2	$ 0.2
Director \| J. Duncan Smith
Related Party Transaction [Line Items]
Total compensation (less than)	$ 0.2	$ 0.2

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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