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Investment Securities (Details Narrative) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Marketable Securities [Line Items] |  |  |
Debt Securities, Available-for-sale | $ 468,951 |  |
Federal Home Loan Bank Stock | 698,300 |  | $ 1,100
Corporate Fixed To Float Bonds [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Debt Securities, Available-for-sale | 6,700 |  | 3,300
Mutual Funds [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Debt Securities, Available-for-sale | 10,200 |  | 8,000
Available-for-sale Securities, Gross Realized Gains | 2,200 | $ 2,100 |
Debt Security, Corporate, Non-US [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Debt Securities, Available-for-sale | 10,000 |  | 10,000
Corporate Bond Securities [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Debt Securities, Available-for-sale | 1,000 |  | 1,000
Venture Capital Funds [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Debt Securities, Available-for-sale | 20,000 |  |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Security Owned and Pledged as Collateral, Amortized Cost | 353,100 |  | 257,300
Security Owned and Pledged as Collateral, Fair Value | 357,500 |  | 265,400
Mortgage-backed Securities, Issued by Private Enterprises [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Security Owned and Pledged as Collateral, Amortized Cost | 51,200 |  | 57,400
Security Owned and Pledged as Collateral, Fair Value | $ 49,100 |  | $ 54,700

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