Note 2 - Recent Events (Detail) - Loans Acquired (USD $) In Thousands, unless otherwise specified	Aug. 03, 2012
Purchased loans	$ 46,323
Acquired with Deteriorated Credit Quality [Member] | Commercial Loan [Member]
Purchased loans	1,968	[1]
Acquired with Deteriorated Credit Quality [Member] | Other Commercial Real Estate [Member]
Purchased loans	5,393	[1]
Acquired with Deteriorated Credit Quality [Member] | Consumer [Member]
Purchased loans	12,972	[1]
Acquired with Deteriorated Credit Quality [Member]
Purchased loans	20,333	[1]
Other Loans Acquired [Member] | Commercial Loan [Member]
Purchased loans	6,694
Other Loans Acquired [Member] | Other Commercial Real Estate [Member]
Purchased loans	560
Other Loans Acquired [Member] | Consumer [Member]
Purchased loans	18,736
Other Loans Acquired [Member]
Purchased loans	25,990
Commercial Loan [Member]
Purchased loans	8,662
Other Commercial Real Estate [Member]
Purchased loans	5,953
Consumer [Member]
Purchased loans	$ 31,708

[1] The accretable yield as of December 31, 2012 totaled $6.7 million.