Note 19 - Parent Company Financial Information - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other assets	$ 35,627	$ 30,299
Total Assets	3,341,290	2,753,297
Total Liabilities	3,092,122	2,508,108
Shareholders’ Equity
Total Shareholders’ Equity	249,168	245,189	$ 226,460	$ 215,053
Total Liabilities and Shareholders’ Equity	3,341,290	2,753,297
Parent Company [Member]
Cash	6,327	27,722
Corporation-obligated mandatorily redeemable capital securities of subsidiary trust holding junior obligations of the corporation	341	341
Investment in subsidiaries	245,158	220,864
Other assets	8,640	7,572
Total Assets	260,466	256,499
Accrued expenses	33	51
Corporation-obligated mandatorily redeemable securities of subsidiary trust holding solely junior subordinated debentures of the corporation	11,265	11,259
Total Liabilities	11,298	11,310
Shareholders’ Equity
Total Shareholders’ Equity	249,168	245,189	$ 226,460	$ 215,053
Total Liabilities and Shareholders’ Equity	$ 260,466	$ 256,499