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Note 20 - Stock-based Compensation

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Text Block]

20.

Stock-based compensation

The Company has a stock option plan for certain officers, key full-time employees and directors of the Company and its subsidiaries. Options are granted at the market price for the underlying shares on the day immediately prior to the date of grant. Each option vests over a four-year term, expires five years from the date granted and allows for the purchase of one Subordinate Voting Share. All Subordinate Voting Shares issued are new shares. As at December 31, 2021, there were 699,300 options available for future grants.

Grants under the Company’s stock option plan are equity-classified awards.

Stock option activity for the years ended December 31, 2021, and 2020 was as follows:

						Weighted average
				Weighted		remaining		Aggregate
	Number of			average		contractual life		intrinsic
	options			exercise price		(years)		value
Shares issuable under options - December 31, 2019		2,001,600		$	58.96
Granted		547,250			85.79
Exercised		(344,225	)		35.86
Forfeited		(14,500	)		70.07
Shares issuable under options - December 31, 2020		2,190,125		$	69.22
Granted		682,500			136.38
Exercised		(292,450	)		49.38
Forfeited		(29,300	)		80.15
Shares issuable under options - December 31, 2021		2,550,875		$	89.34		3.1	$	147,597
Options exercisable - December 31,2021		978,188		$	72.14		2.1	$	73,420

The Company incurred stock-based compensation expense related to these awards of $14,349 during the year ended December 31, 2021 (2020 - $9,628). As at December 31, 2021, the range of option exercise prices was $45.00 to $138.12 per share.

The following table summarizes information about option exercises:

	Year ended December 31,
	2021		2020

Number of options exercised		292,450		344,225

Aggregate fair value	$	32,808	$	25,919
Intrinsic value		14,440		13,576
Amount of cash received		18,367		12,343

Tax benefit recognized	$	937	$	102

As at December 31, 2021, there was $34,339 of unrecognized compensation cost related to non-vested awards which is expected to be recognized over the next four years. During the year ended December 31, 2021, the fair value of options vested was $11,986 (2020 - $7,841).

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model, utilizing the following weighted average assumptions:

	As at December 31,
	2021			2020

Risk free rate		0.8	%		0.2	%
Expected life in years		4.75			4.41
Expected volatility		39.4	%		36.5	%
Dividend yield		0.2	%		0.1	%

Weighted average fair value per option granted	$	46.12		$	28.33

The risk-free interest rate is based on the implied yield of a zero-coupon US Treasury bond with a term equal to the option’s expected term. The expected life in years represents the estimated period of time until exercise and is based on historical experience. The expected volatility is based on the historical prices of the Company’s shares over the previous four years.