Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	$ 395,036	$ 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	42,555	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	42,555	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	219,990	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	219,990	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	151	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	386	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	39,206	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	39,206	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	151	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	394,650	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	92,899	77,313
Municipal Bonds [Member]
Note 8 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value [Line Items]
Available for Sale Securities	$ 92,899	$ 77,313