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Note 12 - Borrowings and Financing Activities Schedule of Senior Notes (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Senior Notes Due 2019 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.50% | 5.50%
Senior Notes Due 2020 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.25% | 5.25%
Senior Notes Due 2021 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 7.00% | 7.00%
Senior Notes Due 2024 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.50% | 4.50%
Senior Notes Due 2027 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.875% | 4.875%
Senior Notes |  |
Debt Instrument [Line Items] |  |
Senior Notes | $ 887,110 | $ 1,030,348
Senior Notes | Senior Notes Due 2019 |  |
Debt Instrument [Line Items] |  |
Senior Notes | 0 | 158,324
Senior Notes | Senior Notes Due 2020 |  |
Debt Instrument [Line Items] |  |
Senior Notes | 0 | 232,729
Senior Notes | Senior Notes Due 2021 |  |
Debt Instrument [Line Items] |  |
Senior Notes | 0 | 195,867
Senior Notes | Senior Notes Due 2024 |  |
Debt Instrument [Line Items] |  |
Senior Notes | $ 444,445 | 443,428
Debt Instrument, Interest Rate, Stated Percentage | 4.50% |
Senior Notes | Senior Notes Due 2027 |  |
Debt Instrument [Line Items] |  |
Senior Notes | $ 442,665 | 0
Debt Instrument, Interest Rate, Stated Percentage | 4.875% |
Federal Home Loan Bank Advances |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year | $ 0 |
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months | 79,002 | 60,550
Long-term Debt, Maturities, Repayments of Principal in Year Two | 19,000 | 2,991
Long-term Debt, Maturities, Repayments of Principal in Year Three | 11,925 | 8,000
Long-term Debt, Maturities, Repayments of Principal in Year Four | 14,994 | 0
Long-term Debt, Maturities, Repayments of Principal in Year Five | 9,954 | 8,995
Long-term Debt, Maturities, Repayments of Principal after Year Five |  | 1,996
Advances from Federal Home Loan Banks | $ 134,875 | $ 82,532

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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