Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	$ 409,652	$ 420,163
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	49,357	47,335
US Government Agencies Debt Securities [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	49,357	47,335
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	228,611	228,674
Residential Mortgage Backed Securities [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	228,611	228,674
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	198	165
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	219	219
Equity Securities [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	417	384
Residential Mortgage Loan Long-Term [Member] | Fair Value, Inputs, Level 2 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	21,862	42,030
Residential Mortgage Loan Long-Term [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	21,862	42,030
Fair Value, Inputs, Level 1 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	198	165
Fair Value, Inputs, Level 2 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	409,235	419,779
Fair Value, Inputs, Level 3 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	219	219
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	109,405	101,740
Municipal Bonds [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	$ 109,405	$ 101,740