Note 7 - Loans (Detail) - Activity Within the Troubled Debt Resturing Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Charge-offs	$ (495,000,000)
Accruing Troubled Debt Restructuring Member
Beginning balance	120,016	136,800
New restructurings	21,712	13,736
Restructured loans restored to accrual status	2,853
Payments	(1,348)	(1,660)
Restructured loans placed on nonaccrual		(12,816)
Expiration of loan concession		(733)
Ending balance	143,233	135,327
Non Accruing Troubled Debt Restructuring Member
Beginning balance	50,870	28,147
New restructurings	5,238	3,679
Restructured loans restored to accrual status	(2,853)
Payments	(27,694)	(408)
Restructured loans placed on nonaccrual		12,816
Charge-offs	(4,018)	(1,104)
Ending balance	$ 21,543	$ 43,130