Note 15 - Additional Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Transfers of Loans Not Covered by FDIC Loss Share to Foreclosed Assets Held-for-sale [Member]
Transfers to foreclosed assets	$ 2,970	$ 7,426
Transfers of Loans Acquired Covered by FDIC Loss Share to Foreclosed Assets Covered by FDIC Loss Share [Member]
Transfers to foreclosed assets		2,288
Transfers of Premises and Equipment to Premises Held for Sale [Member]
Transfers of premises and equipment to premises held for sale	6,167
Transfers of Premises Held-for-sale to Foreclosed Assets Held-for-sale [Member]
Transfers to foreclosed assets	923	6,126
Interest paid	10,817	9,413
Income taxes paid	$ 21,610	$ 13,981