Note 18 - Commitments, Guarantees and Other Contingencies (Details) - Contractual Amounts of the Company’s Unused Lending Commitments (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Commitments to extend credit:
Unused lending commitments	$ 201,119
Single-family Real Estate, Revolving, Open-end Loans [Member]
Commitments to extend credit:
Unused lending commitments	66,706
Single Family Residential Construction Loan [Member]
Commitments to extend credit:
Unused lending commitments	9,477
Commercial Real Estate, Other Construction Loans, and Land Development Loan Commitments [Member]
Commitments to extend credit:
Unused lending commitments	41,259
Commercial and Industrial [Member]
Commitments to extend credit:
Unused lending commitments	36,464
Overdraft Protection Line [Member]
Commitments to extend credit:
Unused lending commitments	30,414
Other Loans [Member]
Commitments to extend credit:
Unused lending commitments	$ 16,799