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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Financial instruments (Details)	12 Months Ended
	Dec. 31, 2021 item
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Number of stages for recognition of expected credit losses	2
Period to trigger provision	12 months
Past due period for significant increased risk	30 days
Past due period for default	90 days

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- Definition

The past due period to qualify as significant increased risk for debt instruments measured at fair value through other comprehensive income.

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- Definition

The period of possible default to trigger provision for expected credit losses without significant increase in risk.

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- Definition

The past due period to determine default for financial assets.

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- Definition

The number of stages in which the entity recognizes expected credit losses.

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