Note 19 - Fair Value Measurements - Financial Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Securities available for sale	$ 692,467	$ 466,091
US Treasury Securities [Member]
Securities available for sale	149,577	34,998
US Government-sponsored Enterprises Debt Securities [Member]
Securities available for sale	104,580	106,023
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale	66,472	59,099
Corporate Debt Securities [Member]
Securities available for sale	15,528	13,189
Fair Value, Recurring [Member]
Securities available for sale	692,467	466,091
Loans held for sale	8,481	15,591
Fair Value, Recurring [Member] | Cash Flow Hedging [Member]
Derivative - cash flow hedges	2,800	4,868
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Loans held for sale	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Cash Flow Hedging [Member]
Derivative - cash flow hedges	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	692,467	466,091
Loans held for sale	8,481	15,591
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Cash Flow Hedging [Member]
Derivative - cash flow hedges	2,800	4,868
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Loans held for sale	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Cash Flow Hedging [Member]
Derivative - cash flow hedges	0	0
Fair Value, Recurring [Member] | US Treasury Securities [Member]
Securities available for sale	149,577	34,998
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	149,577	34,998
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities available for sale	104,580	106,023
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	104,580	106,023
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Securities available for sale	356,310	252,782
Fair Value, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	356,310	252,782
Fair Value, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities available for sale	66,472	59,099
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	66,472	59,099
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Securities available for sale	15,528	13,189
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	15,528	13,189
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	$ 0	$ 0