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Note 3 - Investment Securities Available for Sale (Details) - Amortized Cost And Estimated Fair Value Of Securities Available For Sale (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Note 3 - Investment Securities Available for Sale (Details) - Amortized Cost And Estimated Fair Value Of Securities Available For Sale [Line Items]
Amortized Cost	$ 383,665	$ 290,712
Gross Unrealized Gains	4,003	9,521
Gross Unrealized Losses	9,535	413
Estimated Fair Value	378,133	299,820
US Government Agencies Debt Securities [Member]
Note 3 - Investment Securities Available for Sale (Details) - Amortized Cost And Estimated Fair Value Of Securities Available For Sale [Line Items]
Amortized Cost	46,640	47,606
Gross Unrealized Gains	843	1,477
Gross Unrealized Losses	148	1
Estimated Fair Value	47,335	49,082
Residential Mortgage Backed Securities [Member]
Note 3 - Investment Securities Available for Sale (Details) - Amortized Cost And Estimated Fair Value Of Securities Available For Sale [Line Items]
Amortized Cost	234,206	170,649
Gross Unrealized Gains	1,143	2,730
Gross Unrealized Losses	6,675	296
Estimated Fair Value	228,674	173,083
Municipal Bond [Member]
Note 3 - Investment Securities Available for Sale (Details) - Amortized Cost And Estimated Fair Value Of Securities Available For Sale [Line Items]
Amortized Cost	102,423	72,050
Gross Unrealized Gains	2,017	5,314
Gross Unrealized Losses	2,700	51
Estimated Fair Value	101,740	77,313
Equity Investment Other [Member]
Note 3 - Investment Securities Available for Sale (Details) - Amortized Cost And Estimated Fair Value Of Securities Available For Sale [Line Items]
Amortized Cost	396	407
Gross Unrealized Losses	12	65
Estimated Fair Value	$ 384	$ 342

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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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.

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

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