Note 7 - Loans (Details) - Average Balance and Interest Income Recognized Related to Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	$ 192,196	$ 219,639	$ 193,772	$ 231,875
Impaired Loans - Interest Income Recognized	1,348	1,763	2,758	3,410
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	27,773	20,196	29,300	21,156
Impaired Loans - Interest Income Recognized	194	89	420	200
Real Estate Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	33,049	40,108	33,552	41,082
Impaired Loans - Interest Income Recognized	66	66	132	132
Commercial Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	112,982	141,285	112,148	151,713
Impaired Loans - Interest Income Recognized	995	1,501	2,014	2,863
Residential Mortgage And Equity Lines Member
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	18,392	18,050	18,772	17,924
Impaired Loans - Interest Income Recognized	$ 93	$ 107	$ 192	$ 215