Note 14 - Additional Cash Flow Information (Details) - Additional Cash Flow Information (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Note 14 - Additional Cash Flow Information (Details) - Additional Cash Flow Information [Line Items]
Interest paid	$ 3,372	$ 3,447
Income taxes paid	7,274	1,266
Transfers of Loans Not Covered by FDIC Loss Share to Foreclosed Assets Held-for-sale [Member]
Note 14 - Additional Cash Flow Information (Details) - Additional Cash Flow Information [Line Items]
Transfers to foreclosed assets	2,774	1,386
Transfers of Loans Acquired Covered by FDIC Loss Share to Foreclosed Assets Covered by FDIC Loss Share [Member]
Note 14 - Additional Cash Flow Information (Details) - Additional Cash Flow Information [Line Items]
Transfers to foreclosed assets	435	520
Transfers of Premises Held-for-sale to Foreclosed Assets Held-for-sale [Member]
Note 14 - Additional Cash Flow Information (Details) - Additional Cash Flow Information [Line Items]
Transfers to foreclosed assets	$ 6,126