Note 6 - Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended			9 Months Ended		3 Months Ended			0 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Core Deposit Premium [Member] Delta Acquisition [Member]	Sep. 30, 2014 Core Deposit Premium [Member]	Sep. 30, 2013 Core Deposit Premium [Member]	Sep. 30, 2014 Core Deposit Premium [Member]	Sep. 30, 2013 Core Deposit Premium [Member]	Sep. 30, 2014 Books of Business Intangible [Member] Delta Acquisition [Member] Minimum [Member]	Sep. 30, 2014 Books of Business Intangible [Member] Delta Acquisition [Member] Maximum [Member]	Sep. 30, 2014 Books of Business Intangible [Member] Delta Acquisition [Member]	Sep. 30, 2013 Purchased Credit Card Relationships [Member]	Sep. 30, 2014 Purchased Credit Card Relationships [Member]	Sep. 30, 2013 Purchased Credit Card Relationships [Member]	Sep. 30, 2014 Purchased Credit Card Relationships [Member]	Sep. 30, 2013 Purchased Credit Card Relationships [Member]	Sep. 30, 2014 Delta Acquisition [Member]
Note 6 - Goodwill and Other Intangible Assets (Details) [Line Items]
Goodwill	$ 108,158,000		$ 108,158,000		$ 78,529,000
Goodwill, Acquired During Period																			29,100,000
Finite-Lived Intangible Asset, Useful Life									10 years		10 years	15 years		5 years
Finite-lived Intangible Assets Acquired						4,300,000							5,000,000	2,100,000
Amortization of Intangible Assets	$ 454,000	$ 135,000	$ 1,374,000	$ 408,000			$ 344,000	$ 135,000	$ 1,043,000	$ 408,000					$ 103,000	$ 0	$ 310,000	$ 0