Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	$ 440,546	$ 526,743
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	39,498	49,082
US Government Agencies Debt Securities [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	39,498	49,082
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	208,439	173,083
Residential Mortgage Backed Securities [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	208,439	173,083
Equity Investment Other [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	138	112
Equity Investment Other [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	235	230
Equity Investment Other [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	373	342
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	104,767	226,923
Residential Mortgage Loan Long-Term [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	104,767	226,923
Fair Value, Inputs, Level 1 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	138	112
Fair Value, Inputs, Level 2 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	440,173	526,401
Fair Value, Inputs, Level 3 [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	235	230
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	87,469	77,313
Municipal Bonds [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	$ 87,469	$ 77,313