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Investment Securities (Details Narrative) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Marketable Securities [Line Items] |  |  |  |
Gross Realized Gains | $ 99,200 | $ 99,200 | $ 354,600 |
Gross Realized Losses |  |  | $ 219,600 |
Fair Value | 293,472 | 293,472 |  |
Federal Home Loan Bank Stock | 1,100 | 1,100 |  | $ 991,400
Mutual Funds [Member] |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Gross Realized Gains |  | 2,000 |  |
Gross Realized Losses |  | 2,100 |  |
Fair Value | 6,500 | 6,500 |  | 8,900
Debt Security, Corporate, Non-US [Member] |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Fair Value | 10,000 | 10,000 |  | 10,000
Corporate Debt Securities [Member] |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Fair Value | 3,300 | 3,300 |  |
Corporate Bond Securities [Member] |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Federal Home Loan Bank Stock | 1,000 | 1,000 |  | 1,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Amortized Cost | 171,400 | 171,400 |  | 182,700
Security Pledged Fair Value | 179,100 | 179,100 |  | 183,600
Mortgage-backed Securities, Issued by Private Enterprises [Member] |  |  |  |
Marketable Securities [Line Items] |  |  |  |
Amortized Cost | 61,500 | 61,500 |  | 73,500
Security Pledged Fair Value | $ 58,600 | $ 58,600 |  | $ 73,500

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