Debt Securities Available for Sale - Aggregate Amortized Cost and Fair Value of AFS by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Amortized cost
Amortized cost - Within 1 year	$ 10,556,673
Amortized cost - After 1 to 5 years	2,639,766
Amortized cost - After 5 to 10 years	748,840
Amortized cost - After 10 years	5,572,616
Amortized cost	19,517,895
Fair Value
Fair value - Within 1 year	10,511,675
Fair value - After 1 to 5 years	2,573,499
Fair value - After 5 to 10 years	702,940
Fair value - After 10 years	4,457,789
Debt securities available-for-sale	$ 18,245,903	$ 16,729,044

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).

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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).

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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 second through fifth 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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