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Investment Securities - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Amortized Cost
Due in 1 year or less	$ 250
Due after 1 year but within 5 years	40,013
Due after 5 years but within 10 years	35,017
Due after 10 years	4,059
Available-for-sale securities, amortized cost basis, Total	79,339
Amortized Cost	267,096	$ 63,184
Fair Value
Due in 1 year or less	250
Due after 1 year but within 5 years	38,602
Due after 5 years but within 10 years	32,006
Due after 10 years	3,133
Available-for-sale securities, fair value, Total	73,991
Available-for-sale securities, fair value	242,195	62,862
Amortized Cost
Due in 1 year or less	0
Due after 1 year but within 5 years	73,579
Due after 5 years but within 10 years	232,023
Due after 10 years	43,752
Held-to-maturity securities, amortized cost	349,354
Amortized Cost	402,142	329,257
Fair Value
Due in 1 year or less	0
Due after 1 year but within 5 years	69,250
Due after 5 years but within 10 years	197,794
Due after 10 years	34,118
Held-to-maturity securities, fair value	301,162
Held-to-maturity, Fair Value	346,625	$ 330,626
Mortgage-backed securities
Amortized Cost
Mortgage-backed securities	187,757
Fair Value
Mortgage-backed securities	168,204
Amortized Cost
Mortgage-backed securities	52,788
Fair Value
Mortgage-backed securities	$ 45,463

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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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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 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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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 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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Fair value of investment in debt security measured at amortized cost (held-to-maturity), without single maturity date and not allocated over maturity grouping.

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