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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	$ 219,639	$ 274,757	$ 231,875	$ 294,468
Impaired Loans - Interest Income Recognized	1,763	2,030	3,410	3,474
Commercial Loans Member
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	20,196	29,970	21,156	37,556
Impaired Loans - Interest Income Recognized	89	32	200	62
Real Estate Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	40,108	45,775	41,082	56,115
Impaired Loans - Interest Income Recognized	66	111	132	221
Commercial Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	141,285	179,835	151,713	182,351
Impaired Loans - Interest Income Recognized	1,501	1,849	2,863	3,115
Residential Mortgage And Equity Lines Member
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	18,050	19,177	17,924	18,446
Impaired Loans - Interest Income Recognized	$ 107	$ 38	$ 215	$ 76