Note 9 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses (USD $)	Sep. 30, 2014	Dec. 31, 2013
Note 9 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk	$ 800,387,000	$ 374,543,000
Unused lines of Credit [Member] | Commercial Portfolio Segment [Member]
Note 9 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk	553,734,000	257,937,000
Unused lines of Credit [Member] | Retail 1-4 Family Mortgages [Member]
Note 9 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk	59,991,000	23,429,000
Unused lines of Credit [Member] | Consumer Credit Card Financing Receivable [Member]
Note 9 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk	11,303,000	9,013,000
Unused lines of Credit [Member] | Consumer Other Financing Receivable [Member]
Note 9 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk	9,681,000	5,695,000
Loan Origination Commitments [Member]
Note 9 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk	128,196,000	58,799,000
Standby Letters of Credit [Member]
Note 9 - Commitments and Off-Balance Sheet Risk (Details) - Exposure to Credit Losses [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk	$ 37,482,000	$ 19,670,000