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INVESTMENTS - Reverse repurchase agreements (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Value of reverse repurchase agreements	$ 0	$ 91,000,000
Minimum required collateral for reverse repurchase agreements, expressed as a percentage of loan principal	102.00%

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- Definition

Minimum value of securities received as collateral against securities purchased under agreement to resell, expressed as a percentage of loan principal.

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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- Definition

The carrying value of securities purchased to be resold in reverse repurchase transactions as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant