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Note 13 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

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

		March 31, 2025				December 31, 2024
Risk–free interest rate			4.17%				4.40%
Expected volatility			26.9%				24.1%
Expected life, in years			2.9				2.9
Expected dividend yield			2.81%				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			269,899				91.03				–
Options exercised			(20,981	)			60.93				–
Options cancelled			(3,999	)			75.69				–
Options outstanding at March 31, 2025			876,161			$	80.08			$	11,675,000
Options exercisable at March 31, 2025			342,716			$	68.58			$	8,396,000

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

Options Outstanding March 31, 2025			Exercise Prices						Weighted Average Exercise Price				Weighted Average Remaining Contractual Life in Years
337,912				$53.94	-	$71.64			$	59.95				2.3
538,249				$90.62	-	$106.48				92.72				4.4
876,161									$	80.08				3.6

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- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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