Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded investment in loans, excluding loans acquired, by portfolio segment: (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded investment in loans, excluding loans acquired, by portfolio segment: [Line Items]
Balance, end of period	$ 1,958,178	$ 1,922,119
Loans, excluding acquired loans [Member] | Commercial Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded investment in loans, excluding loans acquired, by portfolio segment: [Line Items]
Loans individually evaluated for impairment	675	768
Loans collectively evaluated for impairment	289,466	234,373
Balance, end of period	290,141	235,141
Loans, excluding acquired loans [Member] | Real Estate Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded investment in loans, excluding loans acquired, by portfolio segment: [Line Items]
Loans individually evaluated for impairment	14,311	28,358
Loans collectively evaluated for impairment	1,124,879	1,034,847
Balance, end of period	1,139,190	1,063,205
Loans, excluding acquired loans [Member] | Credit Cards [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded investment in loans, excluding loans acquired, by portfolio segment: [Line Items]
Loans individually evaluated for impairment	520	547
Loans collectively evaluated for impairment	176,943	184,989
Balance, end of period	177,463	185,536
Loans, excluding acquired loans [Member] | Other Consumer and Other Loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded investment in loans, excluding loans acquired, by portfolio segment: [Line Items]
Loans individually evaluated for impairment	872	1,130
Loans collectively evaluated for impairment	133,495	143,501
Balance, end of period	134,367	144,631
Loans, excluding acquired loans [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded investment in loans, excluding loans acquired, by portfolio segment: [Line Items]
Loans individually evaluated for impairment	16,378	30,803
Loans collectively evaluated for impairment	1,724,783	1,597,710
Balance, end of period	$ 1,741,161	$ 1,628,513