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Securities - Debt Securities, Held-to-maturity, Credit Quality Indicator (Details) $ in Thousands | Dec. 31, 2021 USD ($)
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Investment And Mortgage Backed Securities |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | $ 382,319
Investment Grade | Investment And Mortgage Backed Securities |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 367,516
Non-Investment Grade/Non-rated | Investment And Mortgage Backed Securities |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 14,803
State, municipal, and sovereign debt obligations | Investment securities |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 281,389
State, municipal, and sovereign debt obligations | Investment Grade | Investment securities |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 281,389
State, municipal, and sovereign debt obligations | Non-Investment Grade/Non-rated | Investment securities |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 0
Corporate debt securities | Investment securities |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 68,823
Corporate debt securities | Investment Grade | Investment securities |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 54,020
Corporate debt securities | Non-Investment Grade/Non-rated | Investment securities |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 14,803
Mortgage-backed securities: | Non-agency commercial |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 32,107
Mortgage-backed securities: | Investment Grade | Non-agency commercial |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | 32,107
Mortgage-backed securities: | Non-Investment Grade/Non-rated | Non-agency commercial |
Securities Financing Transaction [Line Items] |
Debt securities held to maturity net of allowance for credit losses | $ 0

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