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SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SUBSEQUENT EVENTS
Available-for-sale investment securities, cost		$ 4,675,474	$ 4,980,102
Subsequent event
SUBSEQUENT EVENTS
Available-for-sale investment securities, cost	$ 786,100
After-tax realized loss	52,300
Proceeds from sales of available-for-sale investment securities	$ 733,800

X

- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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-Section 45
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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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