Note 16 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	March 2023			December 2022			May 2022
Expected volatility		28.4	%		28.9	%		29.5	%
Expected term (years)		8.0			8.0			6.0
Expected dividends		2.92	%		2.55	%		2.52	%
Risk free rate		4.27	%		4.00	%		2.71	%
Grant date fair value	$	5.49		$	6.16		$	5.28

Share-Based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block]

						Weighted-
				Weighted-		Average
				Average		Remaining		Aggregate
				Exercise		Contractual		Intrinsic
(dollars in thousands, except for shares and per share data)	Shares			Price		Term in years		Value
Outstanding at beginning of year		454,610		$	16.97
Granted		30,000			19.87
Exercised		(9,153	)		17.38
Forfeited/cancelled		(37,304	)		11.15
Outstanding at end of period		438,153		$	17.66		4.39	$	—
Options exercisable		336,482		$	17.06		3.11	$	—

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

				Weighted-Average
				Grant Date
	Shares			Fair Value
Outstanding at beginning of year		14,786		$	27.16
Granted		32,248			20.46
Vested		(20,374	)		23.35
Forfeited/cancelled		—			—
Outstanding at end of period		26,660		$	21.97