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Note 9 - Borrowed Funds (Details Textual) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2016 USD ($) | Dec. 31, 2015 USD ($)
Non Callable Fixed Rate Securities [Member] |  |
Number Of Securities Sold Under Agreements To Repurchase | 3 | 4
Securities Sold under Agreements to Repurchase | $ 150,000 | $ 200,000
Weighted Average Rate Of Securities Sold Under Agreements | 2.81% | 2.78%
Floating to Fixed Rate Agreements Totaling 200 Million [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument, Basis Spread on Variable Rate | 3.40% |
Floating to Fixed Rate Agreements Totaling 200 Million [Member] | Maximum [Member] |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.07% |
Floating to Fixed Rate Agreements Totaling 200 Million [Member] | Minimum [Member] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.89% |
Floating to Fixed Rate Agreements Totaling 200 Million [Member] |  |
Number Of Floating To Fixed Rate Agreements | 4,000,000 |
Total Floating to Fixed Rate | $ 200,000 |
Debt, Weighted Average Interest Rate | 5.00% |
Floating Interest Rate Range of Time Period | 1 year |
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member] |  |
Investment Securities Pledged As Collateral | $ 383,000 | $ 430,000
Mature in August 2016 [Member] |  |
Long-term Debt, Maturities, Repayments of Principal in Year Two | 50,000 |
Long-term Debt, Maturities, Repayments of Principal in Year Three | 50,000 |
Long-term Debt, Maturities, Repayments of Principal in Year Four | 50,000 |
Over-night Borrowings [Member] |  |
Advances from Federal Home Loan Banks | $ 300,000 | $ 250,000
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate | 0.38% | 0.27%
At Fixed Rate [Member] |  |
Advances from Federal Home Loan Banks | $ 400,000 | $ 25,000
Maturity in October 2016 [Member] |  |
Advances from Federal Home Loan Banks | 375,000 |
Mature in March 2018 [Member] |  |
Advances from Federal Home Loan Banks | 25,000 |
Securities Sold under Agreements to Repurchase | $ 350,000 | $ 400,000
Weighted Average Rate Of Securities Sold Under Agreements | 4.06% | 3.89%
Advances from Federal Home Loan Banks | $ 700,000 | $ 275,000
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate | 0.47% | 1.13%

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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 of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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