Note 5 - Loans (Details) - Impaired Loans and Related Allowance For Credit Losses (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
With allocated allowance
Allowance	$ 13,284	$ 12,183
Total impaired loans	263,848	323,786
Total impaired loans	200,780	248,597
Total impaired loans	13,284	12,183
Commercial Loans Member
With allocated allowance
Loans with related allowance unpaid principal balance	22,737	7,804
Loans with related allowance recorded investment	13,063	4,959
Allowance	2,519	1,467
Total impaired loans	2,519	1,467
Real Estate Construction Loans [Member]
With allocated allowance
Loans with related allowance unpaid principal balance	28,475	54,718
Loans with related allowance recorded investment	19,323	34,856
Allowance	3,460	8,158
Total impaired loans	3,460	8,158
Commercial Mortgage Loans [Member]
With allocated allowance
Loans with related allowance unpaid principal balance	39,223	14,163
Loans with related allowance recorded investment	35,613	12,928
Allowance	6,584	1,336
Total impaired loans	6,584	1,336
Residential Mortgage And Equity Lines Member
With allocated allowance
Loans with related allowance unpaid principal balance	16,535	14,264
Loans with related allowance recorded investment	14,957	12,428
Allowance	721	1,222
Total impaired loans	721	1,222
With Allocated Allowance Member
With allocated allowance
Loans with related allowance unpaid principal balance	106,970	90,949
Loans with related allowance recorded investment	82,956	65,171
Allowance	13,284	12,183
Total impaired loans	13,284	12,183
Commercial Loans Member
With no allocated allowance
Loans with no related allowance unpaid principal balance	20,992	29,359
Loans with no related allowance recorded investment	18,905	18,963
Real Estate Construction Loans [Member]
With no allocated allowance
Loans with no related allowance unpaid principal balance	25,401	9,304
Loans with no related allowance recorded investment	15,097	7,277
Commercial Mortgage Loans [Member]
With no allocated allowance
Loans with no related allowance unpaid principal balance	105,593	189,871
Loans with no related allowance recorded investment	78,930	152,957
Residential Mortgage And Equity Lines Member
With no allocated allowance
Loans with no related allowance unpaid principal balance	4,892	4,303
Loans with no related allowance recorded investment	4,892	4,229
With No Allocated Allowance Member
With no allocated allowance
Loans with no related allowance unpaid principal balance	156,878	232,837
Loans with no related allowance recorded investment	$ 117,824	$ 183,426