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INCOME TAXES - Summary of Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Valuation allowance movement [Line Items]
Valuation allowance - beginning of year	$ 60,069
Change in valuation allowance	(21,000)
Valuation allowance - end of year	38,711	$ 60,069
Income Tax Expense
Valuation allowance movement [Line Items]
Valuation allowance - beginning of year	39,782	16,918
Valuation allowance - end of year	31,688	39,782
Operating loss carryforwards
Valuation allowance movement [Line Items]
Change in valuation allowance	(8,713)	21,724
Foreign tax credit
Valuation allowance movement [Line Items]
Change in valuation allowance	4,184	2,401
U.K. branch assets and other foreign rate differentials
Valuation allowance movement [Line Items]
Change in valuation allowance	(3,565)	(1,261)
Accumulated Other Comprehensive Income (Loss)
Valuation allowance movement [Line Items]
Valuation allowance - beginning of year	20,287	0
Valuation allowance - end of year	7,023	20,287
Change in investment - related items
Valuation allowance movement [Line Items]
Change in valuation allowance	$ (13,264)	$ 20,287

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-2

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- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-URI https://asc.fasb.org//1943274/2147482685/740-10-50-2

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+ References

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