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Investment Securities - Schedule of Maturities of the Investments in Debt Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Amortized Cost
Within 1 year	$ 169,460	$ 103,337
After 1 year through 5 years	482,450	449,289
After 5 years through 10 years	262,308	207,980
Over 10 years	863,001	203,783
Total	1,777,219	964,389
Estimated Fair Value
Within 1 year	169,303	102,457
After 1 year through 5 years	463,265	434,608
After 5 years through 10 years	255,087	180,370
Over 10 years	851,768	177,599
Total	$ 1,739,423	$ 895,034
Weighted Average Rate
Within 1 year	3.14%	3.22%
After 1 year through 5 years	2.79%	3.32%
After 5 years through 10 years	2.70%	1.77%
Over 10 years	2.41%	3.13%
Total	2.62%	2.96%

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Represents the weighted average rate of available-for-sale debt securities.

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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
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-Section 50
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Fair value 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/2003/role/disclosureRef
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Weighted average yield of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing after 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).

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