Securities - Credit Quality Indicator (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Investment and Mortgage-Backed Securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 349,587
Investment Grade | Investment and Mortgage-Backed Securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	334,222
Non-Investment Grade/Non-rated | Investment and Mortgage-Backed Securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	15,365
State, municipal and sovereign debt obligations | Investment securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	263,614
State, municipal and sovereign debt obligations | Investment Grade | Investment securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	263,614
State, municipal and sovereign debt obligations | Non-Investment Grade/Non-rated | Investment securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	0
Corporate debt securities | Investment securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	59,000
Corporate debt securities | Investment Grade | Investment securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	43,635
Corporate debt securities | Non-Investment Grade/Non-rated | Investment securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	15,365
Non-agency commercial MBS | Non-agency commercial
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	26,973
Non-agency commercial MBS | Investment Grade | Non-agency commercial
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	26,973
Non-agency commercial MBS | Non-Investment Grade/Non-rated | Non-agency commercial
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 0