Note 7 - Goodwill and Identifiable Intangible Assets (Details) - Gross Carrying Amount of Identifiable Intangible Assets and Accumulated Amortization (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 67,108	$ 67,108
Accumulated Amortization	(51,770)	(48,551)
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	56,808	56,808
Accumulated Amortization	(42,215)	(39,242)
Mechant Draft Processing [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,300	10,300
Accumulated Amortization	$ (9,555)	$ (9,309)