Note 7 - Loans (Details) - Average Balance And Interest Income Recognized Related To Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	$ 216,938	$ 263,967	$ 226,841	$ 284,227
Impaired Loans - Interest Income Recognized	1,069	2,246	4,110	6,302
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	32,187	25,987	24,873	33,672
Impaired Loans - Interest Income Recognized	166	49	395	146
Real Estate Construction Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	34,946	41,404	39,014	51,176
Impaired Loans - Interest Income Recognized	67	177	199	531
Commercial Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	132,921	178,206	145,380	180,959
Impaired Loans - Interest Income Recognized	730	1,971	3,289	5,477
Residential Mortgage And Equity Lines Member
Financing Receivable, Impaired [Line Items]
Impaired Loans - Average Recorded Investment	16,884	18,370	17,574	18,420
Impaired Loans - Interest Income Recognized	$ 106	$ 49	$ 227	$ 148