Note 24 - Fair Value of Financial Instruments - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financial Assets:
Securities	$ 1,021,061	$ 640,605
Other Equity Securities	16,619	12,693
Reported Value Measurement [Member]
Financial Assets:
Cash and Short-Term Investments	295,419	323,283
Securities	1,021,061	640,605
Mortgage Loans Held for Sale	1,200	969
Loans - Net	3,160,496	2,969,331
Servicing Rights	1,403	1,439
Cash Value of BOLI	60,380	45,030
Other Equity Securities	16,619	12,693
Total	4,556,578	3,993,350
Financial Liabilities:
Deposits	4,077,283	3,616,679
Borrowings	187,590	105,990
Total	4,264,873	3,722,669
Estimate of Fair Value Measurement [Member]
Financial Assets:
Cash and Short-Term Investments	295,419	323,283
Securities	1,021,061	640,605
Mortgage Loans Held for Sale	1,200	969
Loans - Net	3,121,433	2,969,619
Servicing Rights	1,775	1,439
Cash Value of BOLI	60,380	45,030
Other Equity Securities	16,619	12,693
Total	4,517,887	3,993,638
Financial Liabilities:
Deposits	4,078,558	3,623,253
Borrowings	195,998	127,171
Total	4,274,556	3,750,424
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Cash and Short-Term Investments	295,419	323,283
Securities	0	0
Mortgage Loans Held for Sale	0	0
Loans - Net	0	0
Servicing Rights	0	0
Cash Value of BOLI	0	0
Other Equity Securities	0	0
Total	295,419	323,283
Financial Liabilities:
Deposits	0	0
Borrowings	0	0
Total	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Cash and Short-Term Investments	0	0
Securities	976,971	595,265
Mortgage Loans Held for Sale	1,200	969
Loans - Net	0	0
Servicing Rights	1,775	1,439
Cash Value of BOLI	60,380	45,030
Other Equity Securities	0	0
Total	1,040,326	642,703
Financial Liabilities:
Deposits	0	0
Borrowings	195,998	127,171
Total	195,998	127,171
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Cash and Short-Term Investments	0	0
Securities	44,090	45,340
Mortgage Loans Held for Sale	0	0
Loans - Net	3,121,433	2,969,619
Servicing Rights	0	0
Cash Value of BOLI	0	0
Other Equity Securities	16,619	12,693
Total	3,182,142	3,027,652
Financial Liabilities:
Deposits	4,078,558	3,623,253
Borrowings	0	0
Total	$ 4,078,558	$ 3,623,253