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Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
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Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | $ 987,576 | $ 1,032,924
Fair Value | 984,377 | 1,017,790
Gross Unrealized Gains | 12,003 | 13,709
Gross Unrealized Losses | 15,202 | 28,843
Corporate Debt Securities [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 100,611 | 100,362
Fair Value | 101,490 | 101,711
Gross Unrealized Gains | 1,507 | 2,316
Gross Unrealized Losses | 628 | 967
Municipal [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 143,450 | 127,967
Fair Value | 146,086 | 123,423
Gross Unrealized Gains | 2,819 | 93
Gross Unrealized Losses | 183 | 4,637
Mutual Funds [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 26,974 | 21,565
Fair Value | 26,974 | 21,565
Other Debt Obligations [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 16,388 | 18,160
Fair Value | 13,618 | 14,935
Gross Unrealized Losses | 2,770 | 3,225
Available For Sale Securities Excluding Mortgage Backed Securities [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 287,423 | 268,054
Fair Value | 288,168 | 261,634
Gross Unrealized Gains | 4,326 | 2,409
Gross Unrealized Losses | 3,581 | 8,829
REMIC And CMO [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 497,457 | 494,984
Fair Value | 495,375 | 489,670
Gross Unrealized Gains | 5,705 | 6,516
Gross Unrealized Losses | 7,787 | 11,830
GNMA [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 14,617 | 38,974
Fair Value | 14,839 | 40,874
Gross Unrealized Gains | 430 | 2,325
Gross Unrealized Losses | 208 | 425
FNMA [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 173,048 | 217,615
Fair Value | 170,943 | 212,322
Gross Unrealized Gains | 1,399 | 2,233
Gross Unrealized Losses | 3,504 | 7,526
FHLMC [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 15,031 | 13,297
Fair Value | 15,052 | 13,290
Gross Unrealized Gains | 143 | 226
Gross Unrealized Losses | 122 | 233
Collateralized Mortgage Backed Securities [Member] |  |
Note 4 - Debt and Equity Securities (Details) - Securities Available for Sale [Line Items] |  |
Amortized Cost | 700,153 | 764,870
Fair Value | 696,209 | 756,156
Gross Unrealized Gains | 7,677 | 11,300
Gross Unrealized Losses | $ 11,621 | $ 20,014

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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 Amount before tax of unrealized loss 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 (c) -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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