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	Jun. 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	$ 1,877,631	$ 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	694	768
Loans collectively evaluated for impairment	258,541	234,373
Balance, end of period	259,235	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	14,438	28,358
Loans collectively evaluated for impairment	1,064,813	1,034,847
Balance, end of period	1,079,251	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	507	547
Loans collectively evaluated for impairment	173,029	184,989
Balance, end of period	173,536	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	1,020	1,130
Loans collectively evaluated for impairment	137,353	143,501
Balance, end of period	138,373	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	16,659	30,803
Loans collectively evaluated for impairment	1,633,736	1,597,710
Balance, end of period	$ 1,650,395	$ 1,628,513