Share-Based Compensation and Capital Stock - Summary of Change in Stock-Based Award Activity (Details)	9 Months Ended
	Sep. 30, 2021 $ / shares shares
Stock Options
Options
Outstanding, beginning balance (in shares) | shares	819,610
Granted (in shares) | shares	280,811
Exercised/vested (in shares) | shares	(181,458)
Expired (in shares) | shares	0
Forfeited (in shares) | shares	(1,629)
Outstanding, ending balance (in shares) | shares	917,334
Options exercisable, ending balance (in shares) | shares	425,571
Weighted Average Exercise Price
Beginning balance - weighted average exercise price (in dollars per share) | $ / shares	$ 70.48
Granted - weighted average exercise price (in dollars per share) | $ / shares	104.87
Exercised/vested - weighted average exercise price (in dollars per share) | $ / shares	59.61
Expired - weighted average exercise price (in dollars per share) | $ / shares	0
Forfeited - weighted average exercise price (in dollars per share) | $ / shares	104.87
Ending balance - weighted average exercise price (in dollars per share) | $ / shares	83.10
Options exercisable, ending balance - weighted average exercise price (in dollars per share) | $ / shares	$ 67.02
Weighted Average Remaining Contractual Term
Weighted average remaining contractual term - outstanding, ending balance	5 years 9 months 18 days
Weighted average remaining contractual term - options exercisable, ending balance	3 years 1 month 6 days
Restricted Stock
Restricted Stock, Weighted Average Grant Date Fair Value
Outstanding, beginning balance (in shares) | shares	304,439
Granted (in shares) | shares	55,439
Exercised/vested (in shares) | shares	(106,167)
Forfeited (in shares) | shares	(15,401)
Outstanding, ending balance (in shares) | shares	238,310
Restricted Stock and Performance vested Restricted Stock Units
Outstanding, beginning balance - weighted average grant date fair value (in dollars per share) | $ / shares	$ 84.48
Granted - weighted average grant date fair value (in dollars per share) | $ / shares	107.49
Exercised/vested - weighted average grant date fair value (in dollars per share) | $ / shares	80.80
Forfeited - weighted average grant date fair value (in dollars per share) | $ / shares	89.79
Outstanding, ending balance - weighted average grant date fair value (in dollars per share) | $ / shares	$ 91.12
Performance Vested Restricted Stock Units
Restricted Stock, Weighted Average Grant Date Fair Value
Outstanding, beginning balance (in shares) | shares	321,752
Granted (in shares) | shares	98,544
Performance-based leveraging (in shares) | shares	75,476
Exercised/vested (in shares) | shares	(3,986)
Expired (in shares) | shares	(72,955)
Forfeited (in shares) | shares	(3,324)
Outstanding, ending balance (in shares) | shares	415,507
Restricted Stock and Performance vested Restricted Stock Units
Outstanding, beginning balance - weighted average grant date fair value (in dollars per share) | $ / shares	$ 109.25
Granted - weighted average grant date fair value (in dollars per share) | $ / shares	108.75
Performance-based leveraging - weighted average grant date fair value (in dollars per share) | $ / shares	107.51
Exercised/vested - weighted average grant date fair value (in dollars per share) | $ / shares	81.55
Expired - weighted average grant date fair value (in dollars per share) | $ / shares	81.55
Forfeited - weighted average grant date fair value (in dollars per share) | $ / shares	95.98
Outstanding, ending balance - weighted average grant date fair value (in dollars per share) | $ / shares	$ 114.05