Note 13 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

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

	June 30, 2025		December 31, 2024
Risk–free interest rate		4.13%		4.40%
Expected volatility		27.0%		24.1%
Expected life, in years		2.9		2.9
Expected dividend yield		2.80%		2.63%

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

	Number of Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value
Options outstanding at January 1, 2024		588,534		$	61.30	$	–
Options granted		297,783			94.42		–
Options exercised		(219,973	)		64.73		–
Options cancelled		(35,102	)		79.20		–
Options outstanding at December 31, 2024		631,242			74.73		–
Options granted		306,851			91.45		–
Options exercised		(98,570	)		65.47		–
Options cancelled		(6,333	)		78.77		–
Options outstanding at June 30, 2025		833,190		$	81.96	$	20,875,000
Options exercisable at June 30, 2025		309,544		$	73.00	$	10,528,000

Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

Options Outstanding June 30, 2025	Exercise Prices				Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years
271,823		$53.94	-	$71.64	$	59.55		2.3
561,367		$90.62	-	$106.48		92.81		4.3
833,190					$	81.96		3.6