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Note 11 - Collateralized Securities Transactions (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block] |
|  | Repurchase Agreements |
|  | Remaining Contractual Maturity of the Agreements |
Collateral Type: |  | Overnight and Continuous |  |  | Up to 30 days |  |  | 30 - 90 days |  |  | Greater than 90 days |  |  | Total |
U.S. treasury and government agency MBS (GCF repo) |  | $ | 1,946,890 |  |  | $ | 1,070,094 |  |  | $ | - |  |  | $ | - |  |  | $ | 3,016,984 |
MBS (gestation repo) |  |  | 638,057 |  |  |  | 2,004,451 |  |  |  | 51,530 |  |  |  | - |  |  |  | 2,694,038 |
SBA loans |  |  | 2,190 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,190 |
|  | $ | 2,587,137 |  |  | $ | 3,074,545 |  |  | $ | 51,530 |  |  | $ | - |  |  | $ | 5,713,212 |
|  | Reverse Repurchase Agreements |
|  | Remaining Contractual Maturity of the Agreements |
Collateral Type: |  | Overnight and Continuous |  |  | Up to 30 days |  |  | 30 - 90 days |  |  | Greater than 90 days |  |  | Total |
U.S. treasury and government agency MBS (GCF repo) |  | $ | 871,805 |  |  | $ | 1,016,446 |  |  | $ | 1,091,609 |  |  | $ | 39,816 |  |  | $ | 3,019,676 |
MBS (gestation repo) |  |  | 641,619 |  |  |  | 2,003,514 |  |  |  | 51,534 |  |  |  | - |  |  |  | 2,696,667 |
|  | $ | 1,513,424 |  |  | $ | 3,019,960 |  |  | $ | 1,143,143 |  |  | $ | 39,816 |  |  | $ | 5,716,343 |
|  | Repurchase Agreements |
|  | Remaining Contractual Maturity of the Agreements |
Collateral Type: |  | Overnight and Continuous |  |  | Up to 30 days |  |  | 30 - 90 days |  |  | Greater than 90 days |  |  | Total |
U.S. treasury and government agency MBS (GCF repo) |  | $ | 5,117,811 |  |  | $ | 1,546,510 |  |  | $ | - |  |  | $ | - |  |  | $ | 6,664,321 |
MBS (gestation repo) |  |  | - |  |  |  | 742,035 |  |  |  | 100,403 |  |  |  | - |  |  |  | 842,438 |
SBA loans |  |  | 27,684 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 27,684 |
|  | $ | 5,145,495 |  |  | $ | 2,288,545 |  |  | $ | 100,403 |  |  | $ | - |  |  | $ | 7,534,443 |
|  | Reverse Repurchase Agreements |
|  | Remaining Contractual Maturity of the Agreements |
U.S. treasury and government agency MBS (GCF repo) |  | $ | 1,231,027 |  |  | $ | 2,525,188 |  |  | $ | 2,319,079 |  |  | $ | 575,058 |  |  | $ | 6,650,352 |
MBS (gestation repo) |  |  | - |  |  |  | 747,692 |  |  |  | 101,958 |  |  |  | - |  |  |  | 849,650 |
|  | $ | 1,231,027 |  |  | $ | 3,272,880 |  |  | $ | 2,421,037 |  |  | $ | 575,058 |  |  | $ | 7,500,002 |

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- Definition Tabular disclosure of the nature and risks of short-term collateralized financing obtained through repurchase agreements, securities lending transactions and repurchase-to-maturity transactions, accounted for as secured borrowings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729 + Details
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