Note 5 - Loans Covered By FDIC Loss Share Agreements (Detail) - Adjustments to Company's Financial Results (Covered by FDIC Loss Share Agreements [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Covered by FDIC Loss Share Agreements [Member]
Impact on net interest income	$ 3,004	$ 6,189
Non-interest income	(2,737)	(5,516)
Net impact to pre-tax income	267	673
Net impact, net of taxes	$ 162	$ 409