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Investment Securities (Details Narrative) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Marketable Securities [Line Items] |  |  |
Debt Securities, Available-for-sale | $ 405,848 |  |
Federal Home Loan Bank Stock | 698,300 |  | $ 1,100
Corporate Fixed To Float Bonds [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Debt Securities, Available-for-sale | 3,300 |  | 3,300
Mutual Funds [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Debt Securities, Available-for-sale | 9,700 |  | 8,000
Available-for-sale Securities, Gross Realized Gains | 1,700 | $ 3,800 |
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
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Security Owned and Pledged as Collateral, Amortized Cost | 295,000 |  | 257,300
Security Owned and Pledged as Collateral, Fair Value | 298,700 |  | 265,400
Mortgage-backed Securities, Issued by Private Enterprises [Member] |  |  |
Marketable Securities [Line Items] |  |  |
Security Owned and Pledged as Collateral, Amortized Cost | 53,000 |  | 57,400
Security Owned and Pledged as Collateral, Fair Value | $ 50,800 |  | $ 54,700

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- Definition Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 325 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123599499&loc=d3e63345-112809 + Details
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