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Note 10 - Borrowed Funds (Details Textual) $ in Thousands | Sep. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
--- | --- | ---
Securities Sold under Agreements to Repurchase | $ 100,000 | $ 350,000
Weighted Average Rate Of Securities Sold Under Agreements | 2.86% | 4.06%
Advances from Federal Home Loan Banks | $ 595,000 | $ 350,000
Mature in October 2017 [Member] |  |
Advances from Federal Home Loan Banks | 490,000 |
Mature in 2018 [Member] |  |
Advances from Federal Home Loan Banks | 55,000 |
Mature in December 2019 [Member] |  |
Advances from Federal Home Loan Banks | 50,000 |
Over-night Borrowings [Member] |  |
Advances from Federal Home Loan Banks | $ 450,000 | $ 275,000
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate | 1.16% | 0.55%
Non Overnight Borrowings [Member] |  |
Advances from Federal Home Loan Banks | $ 145,000 |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate | 1.35% |
Securities Sold under Agreements to Repurchase [Member] |  |
Investment Securities Pledged As Collateral | $ 108,000 | $ 372,000
Non Callable Fixed Rate Securities [Member] |  |
Number Of Securities Sold Under Agreements To Repurchase | 2 |
Non Callable Fixed Rate Securities [Member] | Mature in August 2016 [Member] |  |
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months | $ 50,000 |
Long-term Debt, Maturities, Repayments of Principal in Year Two | $ 50,000 |

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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://www.xbrl.org/2003/role/presentationRef -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 the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(a)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49176635&loc=d3e9760-107771 + Details
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