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Note 4 - Investment Securities Available-for-sale (Details) - Securities in Continuous Unrealized Loss Position (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
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Note 4 - Investment Securities Available-for-sale (Details) - Securities in Continuous Unrealized Loss Position [Line Items] |  |
Less than 12 Months Estimated Fair Value | $ 34,818 | $ 210,707
Less than 12 Months Unrealized Losses | 181 | 8,652
12 Months or Greater Estimated Fair Value | 125,375 | 19,019
12 Months or Greater Unrealized Losses | 3,534 | 883
Total Estimated Fair Value | 160,193 | 229,726
Total Unrealized Losses | 3,715 | 9,535
US Government Agencies Debt Securities [Member] |  |
Note 4 - Investment Securities Available-for-sale (Details) - Securities in Continuous Unrealized Loss Position [Line Items] |  |
Less than 12 Months Estimated Fair Value | 2,015 | 4,782
Less than 12 Months Unrealized Losses | 5 | 148
12 Months or Greater Estimated Fair Value | 4,774 |
12 Months or Greater Unrealized Losses | 94 |
Total Estimated Fair Value | 6,789 | 4,782
Total Unrealized Losses | 99 | 148
Residential Mortgage Backed Securities [Member] |  |
Note 4 - Investment Securities Available-for-sale (Details) - Securities in Continuous Unrealized Loss Position [Line Items] |  |
Less than 12 Months Estimated Fair Value | 25,330 | 155,475
Less than 12 Months Unrealized Losses | 125 | 5,992
12 Months or Greater Estimated Fair Value | 100,557 | 15,658
12 Months or Greater Unrealized Losses | 2,976 | 683
Total Estimated Fair Value | 125,887 | 171,133
Total Unrealized Losses | 3,101 | 6,675
Equity Investment Other [Member] |  |
Note 4 - Investment Securities Available-for-sale (Details) - Securities in Continuous Unrealized Loss Position [Line Items] |  |
Less than 12 Months Estimated Fair Value | 169 |
Less than 12 Months Unrealized Losses | 9 |
12 Months or Greater Estimated Fair Value |  | 165
12 Months or Greater Unrealized Losses |  | 12
Total Estimated Fair Value | 169 | 165
Total Unrealized Losses | 9 | 12
Municipal Bonds [Member] |  |
Note 4 - Investment Securities Available-for-sale (Details) - Securities in Continuous Unrealized Loss Position [Line Items] |  |
Less than 12 Months Estimated Fair Value | 7,304 | 50,450
Less than 12 Months Unrealized Losses | 42 | 2,512
12 Months or Greater Estimated Fair Value | 20,044 | 3,196
12 Months or Greater Unrealized Losses | 464 | 188
Total Estimated Fair Value | 27,348 | 53,646
Total Unrealized Losses | $ 506 | $ 2,700

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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