Capital Stock and Equity Awards - Summary of Option Activity (Details) - $ / shares	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Shares
Exercised (in shares)	(79,615)
Weighted- Average Exercise Price
Weighted-average remaining contractual life of options outstanding	2 years 2 months 12 days
Weighted-average remaining contractual life of options exercisable	2 years 2 months 12 days
Options
Shares
Beginning of period (in shares)	643,851	1,115,324
Granted (in shares)	0	0
Exercised (in shares)	(79,615)	(450,514)
Forfeited (in shares)	0	(12,058)
End of period (in shares)	564,236	652,752
Exercisable, end of period (in shares)	564,236	599,241
Weighted- Average Exercise Price
Beginning of period (in dollars per share)	$ 30.41	$ 29.02
Granted (in dollars per share)	0	0
Exercised (in dollars per share)	31.77	26.68
Forfeited (in dollars per share)	0	36.84
End of period (in dollars per share)	30.22	30.50
Exercisable, end of period (in dollars per share)	$ 30.22	$ 29.44
Contractual life (in years)	7 years
Minimum | Options
Weighted- Average Exercise Price
Vesting period (in years)	3 years
Maximum | Options
Weighted- Average Exercise Price
Vesting period (in years)	4 years