Note 18 - Parent Company Financial Information (Details) - Balance Sheet (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Other assets	$ 17,319	$ 17,468
Total Assets	1,214,598	961,665
Liabilities
Accrued expenses	6,816	6,519
Total Liabilities	1,101,787	898,766
Shareholders’ Equity
Total Shareholders’ Equity	112,811	62,899	69,902	64,851
Total Liabilities and Shareholders’ Equity	1,214,598	961,665
Parent Company [Member]
ASSETS
Cash	9,471	697
Corporation-obligated mandatorily redeemable capital securities of subsidiary trust holding junior obligations of the corporation	676	676
Investment in subsidiaries	121,278	80,666
Other assets	3,880	3,354
Total Assets	135,305	85,393
Liabilities
Accrued expenses	18	18
Corporation-obligated mandatorily redeemable securities of subsidiary trust holding solely junior subordinated debentures of the corporation	22,476	22,476
Total Liabilities	22,494	22,494
Shareholders’ Equity
Total Shareholders’ Equity	112,811	62,899	69,902	64,851
Total Liabilities and Shareholders’ Equity	$ 135,305	$ 85,393