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INVESTMENT SECURITIES - Debt Maturities (Details) - Investment securities - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Amortized Cost
Due within one year	$ 876,565
Due after one year through five years	2,267,630
Due after five years through ten years	2,540,002
Due after ten years	1,030,580
Available-for-sale, amortized cost	6,714,777	$ 6,105,116
Fair Value
Due within one year	877,887
Due after one year through five years	2,272,750
Due after five years through ten years	2,481,095
Due after ten years	1,024,214
Total fair value	$ 6,655,946	$ 5,953,014
Weighted- Average Yield
Due within one year	4.05%
Due after one year through five years	4.14%
Due after five years through ten years	3.80%
Due after ten years	4.79%
Weighted-average yield	4.10%

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Available-for-sale Securities, Debt Maturities, after Ten Years, Weighted-Average Yield

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

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