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Note 11 - Fair Value Measurements (Details) - Fair Values of Financial Instruments - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014 | Sep. 30, 2014
Assets |  |  |
Cash and due from banks, carrying value | $ 10,703 | $ 9,097 | $ 7,920
Cash and due from banks, fair value | 10,703 | 9,097 |
Federal funds sold, carrying value | 4,076 | 3,516 | 8,968
Federal funds sold, fair value | 4,076 | 3,516 | 8,968
Interest bearing deposits with other banks, carrying value | 291,276 | 243,412 | 191,468
Interest bearing deposits with other banks, fair value | 291,276 | 243,412 | 191,468
Investment securities, carrying value | 524,326 | 382,343 | 382,468
Investment securities, fair value | 524,326 | 382,343 | 382,468
Federal Reserve and Federal Home Loan Bank stock, carrying value | 16,865 | 22,560 |
Federal Reserve and Federal Home Loan Bank stock, fair value | 16,865 | 22,560 |
Loans held for sale, carrying value | 35,713 | 44,317 | 41,254
Loans held for sale, fair value | 35,713 | 44,669 |
Loans, carrying value | 4,776,965 | 4,312,399 | 3,432,548
Loans, fair value | 4,778,753 | 4,314,618 |
Bank owned life insurance, carrying value | 58,284 | 56,594 | 40,432
Bank owned life insurance, fair value | 58,284 | 56,594 | 40,432
Annuity investment, carrying value | 12,137 | 11,277 |
Annuity investment, fair value | 12,137 | 11,277 |
derivatives-asset, carrying value | 3,445 |  |
derivatives-asset, fair value | 3,445 |  |
Liabilities |  |  |
Noninterest bearing deposits | 4,926,588 | 4,310,768 | $ 3,533,850
Certificates of deposit | 802,115 | 688,741 |
Certificates of deposit | 802,449 | 688,067 |
Customer repurchase agreements | 64,893 | 61,120 |
Customer repurchase agreements | 64,893 | 61,120 |
Borrowings, carrying value | 70,000 | 219,300 |
Borrowings, fair value | 70,000 | 220,838 |
Mortgage banking derivatives-liabilities | 245 | 250 |
Mortgage Banking Derivative [Member] |  |  |
Assets |  |  |
derivatives-asset, carrying value | 197 | 146 |
derivatives-asset, fair value | 197 | 146 |
Noninterest-bearing Deposits [Member] |  |  |
Liabilities |  |  |
Noninterest bearing deposits | 1,402,447 | 1,175,799 |
Noninterest bearing deposits | 1,402,447 | 1,175,799 |
Interest-bearing Deposits [Member] |  |  |
Liabilities |  |  |
Noninterest bearing deposits | 2,722,026 | 2,446,228 |
Noninterest bearing deposits | 2,722,026 | 2,446,228 |
Fair Value, Inputs, Level 1 [Member] |  |  |
Assets |  |  |
Investment securities, carrying value | 125 | 198 |
Investment securities, fair value | 125 | 198 |
Fair Value, Inputs, Level 2 [Member] |  |  |
Assets |  |  |
Cash and due from banks, fair value | 10,703 | 9,097 |
Federal funds sold, carrying value | 4,076 | 3,516 |
Federal funds sold, fair value | 4,076 | 3,516 |
Interest bearing deposits with other banks, carrying value | 291,276 | 243,412 |
Interest bearing deposits with other banks, fair value | 291,276 | 243,412 |
Investment securities, carrying value | 523,982 | 381,926 |
Investment securities, fair value | 523,982 | 381,926 |
Federal Reserve and Federal Home Loan Bank stock, fair value | 16,865 | 22,560 |
Loans held for sale, fair value | 35,713 | 44,669 |
Loans, fair value | 6,346 | 1,489 |
Bank owned life insurance, carrying value | 58,284 | 56,594 |
Bank owned life insurance, fair value | 58,284 | 56,594 |
Annuity investment, fair value | 12,137 | 11,277 |
derivatives-asset, fair value | 3,445 |  |
Liabilities |  |  |
Certificates of deposit | 802,449 | 688,067 |
Customer repurchase agreements | 64,893 | 61,120 |
Borrowings, fair value | 70,000 | 220,838 |
Fair Value, Inputs, Level 2 [Member] | Noninterest-bearing Deposits [Member] |  |  |
Liabilities |  |  |
Noninterest bearing deposits | 1,402,447 | 1,175,799 |
Fair Value, Inputs, Level 2 [Member] | Interest-bearing Deposits [Member] |  |  |
Liabilities |  |  |
Noninterest bearing deposits | 2,722,026 | 2,446,228 |
Fair Value, Inputs, Level 3 [Member] |  |  |
Assets |  |  |
Investment securities, carrying value | 219 | 219 |
Investment securities, fair value | 219 | 219 |
Loans, fair value | 4,772,407 | 4,313,129 |
Liabilities |  |  |
Mortgage banking derivatives-liabilities | 245 | 250 |
Fair Value, Inputs, Level 3 [Member] | Mortgage Banking Derivative [Member] |  |  |
Assets |  |  |
derivatives-asset, fair value | $ 197 | $ 146 |

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- Definition Fair value amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts. + References No definition available. + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 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 210.9-03.1) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1, 2, 3 -Article 9 + Details
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- Definition Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Surrender Value -URI http://asc.fasb.org/extlink&oid=6507153 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets 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 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13495-108611 Reference 6: 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=51825145&loc=SL20226008-175313 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Glossary Loan -URI http://asc.fasb.org/extlink&oid=6517073 + Details
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