Note 6 - Fair Value Measurements and Fair Values of Financial Instruments (Details) - Assets Measured at Fair Value (USD $) | Dec. 31, 2014 | Dec. 31, 2013 |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | $516,807,000 | $482,658,000 |
Nonrecurring fair value measurements | | |
Impaired loans with a valuation allowance | 3,241,000 | 9,889,000 |
Valuation allowance | -769,000 | -2,333,000 |
Foreclosed assets held for sale | 1,189,000 | 892,000 |
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 26,676,000 | 45,877,000 |
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 26,676,000 | 45,877,000 |
US Government Agencies Debt Securities [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 26,676,000 | 45,877,000 |
Obligations of States and Political Subdivisions, Tax-exempt [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Obligations of States and Political Subdivisions, Tax-exempt [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 124,839,000 | 128,426,000 |
Obligations of States and Political Subdivisions, Tax-exempt [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Obligations of States and Political Subdivisions, Tax-exempt [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 124,839,000 | 128,426,000 |
Obligations of States and Political Subdivisions, Tax-exempt [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 124,839,000 | 128,426,000 |
Obligations of States and Political Subdivisions, Taxable [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Obligations of States and Political Subdivisions, Taxable [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 33,878,000 | 34,471,000 |
Obligations of States and Political Subdivisions, Taxable [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Obligations of States and Political Subdivisions, Taxable [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 33,878,000 | 34,471,000 |
Obligations of States and Political Subdivisions, Taxable [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 33,878,000 | 34,471,000 |
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 83,903,000 | 86,208,000 |
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Collateralized Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 83,903,000 | 86,208,000 |
Collateralized Mortgage Backed Securities [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 83,903,000 | 86,208,000 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 238,823,000 | 178,092,000 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 238,823,000 | 178,092,000 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 238,823,000 | 178,092,000 |
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 34,000 | 660,000 |
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 34,000 | 660,000 |
Collateralized Debt Obligations [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 34,000 | 660,000 |
Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 508,153,000 | 473,734,000 |
Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 508,153,000 | 473,734,000 |
Debt Securities [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 508,153,000 | 473,734,000 |
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 8,654,000 | 8,924,000 |
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 8,654,000 | 8,924,000 |
Equity Securities [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 8,654,000 | 8,924,000 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 8,654,000 | 8,924,000 |
Servicing rights | 0 | 0 |
Total recurring fair value measurements | 8,654,000 | 8,924,000 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member] | | |
Nonrecurring fair value measurements | | |
Impaired loans with a valuation allowance | 0 | 0 |
Valuation allowance | 0 | 0 |
Impaired loans, net | 0 | 0 |
Foreclosed assets held for sale | 0 | 0 |
Total nonrecurring fair value measurements | 0 | 0 |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 508,153,000 | 473,734,000 |
Servicing rights | 0 | 0 |
Total recurring fair value measurements | 508,153,000 | 473,734,000 |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member] | | |
Nonrecurring fair value measurements | | |
Impaired loans with a valuation allowance | 0 | 0 |
Valuation allowance | 0 | 0 |
Impaired loans, net | 0 | 0 |
Foreclosed assets held for sale | 0 | 0 |
Total nonrecurring fair value measurements | 0 | 0 |
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 516,807,000 | 482,658,000 |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 0 | 0 |
Servicing rights | 1,281,000 | 1,123,000 |
Total recurring fair value measurements | 1,281,000 | 1,123,000 |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | | |
Nonrecurring fair value measurements | | |
Impaired loans with a valuation allowance | 3,241,000 | 9,889,000 |
Valuation allowance | -769,000 | -2,333,000 |
Impaired loans, net | 2,472,000 | 7,556,000 |
Foreclosed assets held for sale | 1,189,000 | 892,000 |
Total nonrecurring fair value measurements | 3,661,000 | 8,448,000 |
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | | |
AVAILABLE-FOR-SALE SECURITIES: | | |
Available-for-sale securities | 516,807,000 | 482,658,000 |
Servicing rights | 1,281,000 | 1,123,000 |
Total recurring fair value measurements | 518,088,000 | 483,781,000 |
Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value Measurement [Member] | | |
Nonrecurring fair value measurements | | |
Impaired loans with a valuation allowance | 3,241,000 | 9,889,000 |
Valuation allowance | -769,000 | -2,333,000 |
Impaired loans, net | 2,472,000 | 7,556,000 |
Foreclosed assets held for sale | 1,189,000 | 892,000 |
Total nonrecurring fair value measurements | $3,661,000 | $8,448,000 |