Note 7 - Loans (Detail) - Schedule of Average Balance And Interest Income Recognized Related To Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Impaired Loans - Average Recorded Investment	$ 314,179	$ 397,655
Impaired Loans - Interest Income Recognized	1,561	1,693
Commercial Loans Member
Impaired Loans - Average Recorded Investment	45,142	41,982
Impaired Loans - Interest Income Recognized	257	272
Real Estate Construction Loans [Member]
Impaired Loans - Average Recorded Investment	66,455	86,024
Impaired Loans - Interest Income Recognized	176	330
Commercial Mortgage Loans [Member]
Impaired Loans - Average Recorded Investment	184,867	253,130
Impaired Loans - Interest Income Recognized	1,088	1,066
Residential Mortgage And Equity Lines Member
Impaired Loans - Average Recorded Investment	17,715	16,519
Impaired Loans - Interest Income Recognized	$ 40	$ 25