Debt Securities Held-to-maturity - Aggregate Amortized Cost and Fair Value of HTMS by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Held-to-maturity Securities, Classified [Abstract]
Amortized cost - Within 1 year	$ 4,240
Amortized cost - After 1 to 5 years	14,420
Amortized cost - After 5 to 10 years	11,280
Amortized cost - After 10 years	49,521
Amortized cost	79,461	$ 92,621
Fair Value - within 1 year	4,237
Fair Value - After 1 to 5 years	14,421
Fair Value - After 5 to 10 years	11,262
Fair Value - After 10 years	53,448
Held to maturity securities fair value	$ 83,368	$ 94,891

Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), 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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