Debt Securities Available for Sale - Aggregate Amortized Cost and Fair Value of AFS by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amortized cost
Amortized cost - Within 1 year	$ 4,576,127
Amortized cost - After 1 to 5 years	6,873,043
Amortized cost - After 5 to 10 years	1,223,590
Amortized cost - After 10 years	6,889,789
Amortized cost	19,562,549
Fair Value
Fair value - Within 1 year	4,529,477
Fair value - After 1 to 5 years	6,458,553
Fair value - After 5 to 10 years	1,120,944
Fair value - After 10 years	5,695,400
Fair Value	$ 17,804,374	$ 24,968,269

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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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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