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Note 3 - Securities (Details) - Available-for-sale Securities (USD $) | Sep. 30, 2014 | Dec. 31, 2013
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Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Securities available for sale, amortized cost | $ 457,458,000 |  | $ 139,487,000 |
Securities available for sale, gross unrealized gains | 3,021,000 |  | 1,791,000 |
Securities available for sale, gross unrealized losses | (6,470,000) |  | (10,100,000) |
Securities available for sale | 454,009,000 | [1] | 131,178,000 | [1]
US Government Agencies Debt Securities [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Securities available for sale, amortized cost | 209,371,000 |  | 108,279,000 |
Securities available for sale, gross unrealized gains | 823,000 |  | 263,000 |
Securities available for sale, gross unrealized losses | (5,717,000) |  | (10,065,000) |
Securities available for sale | 204,477,000 |  | 98,477,000 |
Collateralized Mortgage Backed Securities [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Securities available for sale, amortized cost | 99,574,000 |  | 12,456,000 |
Securities available for sale, gross unrealized gains | 1,083,000 |  | 1,102,000 |
Securities available for sale, gross unrealized losses | (399,000) |  | 0 |
Securities available for sale | 100,258,000 |  | 13,558,000 |
Municipal General Obligation Bonds [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Securities available for sale, amortized cost | 135,575,000 |  | 16,488,000 |
Securities available for sale, gross unrealized gains | 1,003,000 |  | 388,000 |
Securities available for sale, gross unrealized losses | (328,000) |  | (4,000) |
Securities available for sale | 136,250,000 |  | 16,872,000 |
Municipal Revenue Bonds [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Securities available for sale, amortized cost | 11,022,000 |  | 878,000 |
Securities available for sale, gross unrealized gains | 112,000 |  | 38,000 |
Securities available for sale, gross unrealized losses | (17,000) |  | 0 |
Securities available for sale | 11,117,000 |  | 916,000 |
Other Debt Obligations [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Securities available for sale, amortized cost | 1,916,000 |  |  |
Securities available for sale, gross unrealized gains | 0 |  |  |
Securities available for sale, gross unrealized losses | (9,000) |  |  |
Securities available for sale | 1,907,000 |  |  |
Mutual Funds [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Securities available for sale, amortized cost |  |  | 1,386,000 |
Securities available for sale, gross unrealized gains |  |  | 0 |
Securities available for sale, gross unrealized losses |  |  | (31,000) |
Securities available for sale |  |  | $ 1,355,000 |
[1] | See Note 12 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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