Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Common Share [Line Items]
Conversion price (in dollars per share)	$ 101.38	$ 101.38
Numerator — basic and diluted
Net income	$ 59,321	$ 64,496
Denominator
Weighted average number of common shares outstanding — basic (in shares)	33,619	33,483
Effect of dilutive share-based awards (in shares)	691	760
Effect of dilutive stock options (in shares)	338	370
Effect of dilutive convertible notes (in shares)	998	450
Weighted average number of common shares outstanding — diluted (in shares)	35,646	35,063
Earnings per common share — basic (in dollars per share)	$ 1.76	$ 1.93
Earnings per common share — diluted (in dollars per share)	$ 1.66	$ 1.84
Stock Options And Share-Based Awards
Denominator
Antidilutive stock options and share-based awards (in shares)	6	8