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Note 8 - Deposits (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Note 8 - Deposits (Details) [Line Items] |  |
Interest-bearing Domestic Deposit, Brokered | $ 982,800 | $ 763,900
Time Deposits, $250,000 or More | 169,200 | 109,600
Deposits | 3,892,547 | 3,508,598
Denomination [Member] |  |
Note 8 - Deposits (Details) [Line Items] |  |
Interest-bearing Domestic Deposit, Brokered | 1,000,000 |
Letter of Credit Pledged as Collateral [Member] |  |
Note 8 - Deposits (Details) [Line Items] |  |
Deposit Liabilities, Collateral Issued, Financial Instruments | 494,000 |
Government Deposits [Member] |  |
Note 8 - Deposits (Details) [Line Items] |  |
Deposits | 975,900 | 891,900
Government Deposits [Member] | ICS Deposits [Member] |  |
Note 8 - Deposits (Details) [Line Items] |  |
Deposits | 210,700 | 94,000
Government Deposits [Member] | Collateralized Deposits [Member] |  |
Note 8 - Deposits (Details) [Line Items] |  |
Deposits | 765,200 | 797,900
Government Deposits [Member] | Securities Pledged as Collateral [Member] |  |
Note 8 - Deposits (Details) [Line Items] |  |
Deposit Liabilities, Collateral Issued, Financial Instruments | 364,700 | 379,300
Government Deposits [Member] | Letter of Credit Pledged as Collateral [Member] |  |
Note 8 - Deposits (Details) [Line Items] |  |
Deposit Liabilities, Collateral Issued, Financial Instruments | $ 494,000 | $ 499,100

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- Definition The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $250,000 or more. + References No definition available. + Details
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- Definition Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=50488274&loc=d3e64164-112818 + Details
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- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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