Note 21 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

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

						Weighted average
				Weighted		remaining		Aggregate
	Number of			average		contractual life		intrinsic
	options			exercise price		(years)		value
Shares issuable under options - December 31, 2021		2,550,875		$	89.34
Granted		837,500			95.69
Exercised		(305,125	)		54.99
Forfeited		(30,250	)		110.73
Shares issuable under options - December 31, 2022		3,053,000		$	94.30
Granted		815,000			106.75
Exercised		(600,500	)		70.04
Forfeited		(25,250	)		119.82
Shares issuable under options - December 31, 2023		3,242,250		$	101.73		3.2	$	87,846
Options exercisable - December 31, 2023		1,378,039		$	94.61		2.2	$	47,249

Stock Options Exercised [Table Text Block]

	Year ended December 31,
	2023		2022
Number of options exercised		600,500		305,125
Aggregate fair value	$	68,629	$	41,528
Intrinsic value		26,571		16,779
Amount of cash received		42,058		24,749
Tax benefit recognized	$	131	$	754

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

	As at December 31,
	2023			2022
Risk free rate		4.9	%		4.2	%
Expected life in years		4.75			4.75
Expected volatility		42.3	%		41.2	%
Dividend yield		0.3	%		0.3	%
Weighted average fair value per option granted	$	44.78		$	38.22