Note 5 - Acquired Loans (Details) - Acquired Loans (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Covered Loan [Member]
Note 5 - Acquired Loans (Details) - Acquired Loans [Line Items]
Purchased impaired loans	$ 133,675	[1]	$ 154,762	[1]
Other loans (2)	38,186	[2]	43,132	[2]
Total acquired loans	171,861		197,894
Non-Covered Loan [Member]
Note 5 - Acquired Loans (Details) - Acquired Loans [Line Items]
Purchased impaired loans	16,312		18,198
Other loans (2)	20,441	[2]	22,480	[2]
Total acquired loans	36,753		40,678
Covered and Non-Covered Loan [Member]
Note 5 - Acquired Loans (Details) - Acquired Loans [Line Items]
Purchased impaired loans	149,987		172,960
Other loans (2)	58,627	[2]	65,612	[2]
Total acquired loans	$ 208,614		$ 238,572

[1] At acquisition, the Company made an election to account for certain covered loans as purchased impaired loans. These loans totaled $26.3 million at June 30, 2013 and $28.1 million at December 31, 2012.

[2] These loans did not meet the requirements to be accounted for as purchased impaired loans at acquisition.