Shareholders' Equity - Summary of Stock Options Granted (Detail) $ / shares in Units, $ / shares in Units, $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CAD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 CAD ($) $ / shares shares	Dec. 31, 2020 CAD ($) $ / shares shares	Dec. 31, 2019 CAD ($) $ / shares shares	Dec. 31, 2019 CAD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Number of Options
Granted (in shares)	480,117	480,117
Weighted- Average Contractual Term (years)
Weighted-average contractual term, vested and expected to vest	1 year 10 months 24 days	1 year 10 months 24 days
Canadian Dollar Under the New Option Stock Plan
Number of Options
Outstanding, beginning balance (in shares)	2,285,569	2,285,569	2,356,413	2,356,413
Granted (in shares)	480,117	480,117	413,750	413,750
Expired (in shares)	0	0	0	0
Exercised (in shares)	(212,817)	(212,817)	(404,963)	(404,963)
Forfeited (in shares)	(64,214)	(64,214)	(79,631)	(79,631)
Outstanding, ending balance (in shares)	2,488,655	2,488,655	2,285,569	2,285,569	2,356,413	2,356,413
Exercisable (in shares)	1,715,062						1,715,062
Vested and expected to vest (in shares)	2,440,510						2,440,510
Weighted- Average Exercise Price ($)
Beginning balance (in dollars per share) | (per share)	$ 22.00	$ 17.27	$ 16.21	$ 12.46
Granted (in dollars per share) | (per share)	42.83	34.12	49.22	36.25
Expired (in dollars per share) | (per share)	0	0	0	0
Exercised (in dollars per share) | (per share)	14.77	11.69	13.82	10.48
Forfeited (in dollars per share) | (per share)	40.69	32.48	33.89	25.30
Ending balance (in dollars per share) | (per share)	26.15	20.70	$ 22.00	$ 17.27	$ 16.21	$ 12.46
Exercisable (in dollars per share) | (per share)	19.29	$ 15.16
Vested and expected to vest (in dollars per share) | (per share)	$ 25.84						$ 20.31
Weighted- Average Contractual Term (years)
Weighted-average contractual term, outstanding	6 years 2 months 26 days	6 years 2 months 26 days	6 years 5 months 15 days	6 years 5 months 15 days	6 years 8 months 12 days	6 years 8 months 12 days
Weighted-average contractual term, exercisable	5 years 10 days	5 years 10 days
Weighted-average contractual term, vested and expected to vest	6 years 1 month 13 days	6 years 1 month 13 days
Aggregate intrinsic value ($)
Aggregate intrinsic value outstanding	$ 7,919		$ 87,545	$ 87,545	$ 101,404	$ 101,404	$ 6,224	$ 68,664	$ 77,807
Aggregate intrinsic value exercisable	7,658	$ 6,018
Aggregate intrinsic vested and expected to vest	$ 7,734						$ 6,078
U.S Dollar Under the New Option Stock Plan
Number of Options
Outstanding, beginning balance (in shares)	3,790,326	3,790,326	2,853,346	2,853,346
Granted (in shares)	1,726,421	1,726,421	1,247,550	1,247,550
Expired (in shares)	0	0	0	0
Exercised (in shares)	(289,202)	(289,202)	(197,195)	(197,195)
Forfeited (in shares)	(310,631)	(310,631)	(113,375)	(113,375)
Outstanding, ending balance (in shares)	4,916,914	4,916,914	3,790,326	3,790,326	2,853,346	2,853,346
Exercisable (in shares)	2,314,998						2,314,998
Vested and expected to vest (in shares)	4,750,727						4,750,727
Weighted- Average Exercise Price ($)
Beginning balance (in dollars per share) | $ / shares		$ 22.85		$ 15.85
Granted (in dollars per share) | $ / shares		33.61		37.11
Expired (in dollars per share) | $ / shares		0		0
Exercised (in dollars per share) | $ / shares		13.66		14.59
Forfeited (in dollars per share) | $ / shares		31.95		18.01
Ending balance (in dollars per share) | $ / shares		26.59		$ 22.85		$ 15.85
Exercisable (in dollars per share) | $ / shares		$ 20.18
Vested and expected to vest (in dollars per share) | $ / shares							$ 26.37
Weighted- Average Contractual Term (years)
Weighted-average contractual term, outstanding	7 years 11 months 4 days	7 years 11 months 4 days	8 years 2 months 12 days	8 years 2 months 12 days	8 years 7 months 28 days	8 years 7 months 28 days
Weighted-average contractual term, exercisable	6 years 11 months 19 days	6 years 11 months 19 days
Weighted-average contractual term, vested and expected to vest	7 years 10 months 24 days	7 years 10 months 24 days
Aggregate intrinsic value ($)
Aggregate intrinsic value outstanding | $							$ 5,555	$ 92,705	$ 84,481
Aggregate intrinsic value exercisable | $		$ 5,224
Aggregate intrinsic vested and expected to vest | $							$ 5,537