Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share

	Three months ended
	March 31,
	2020		2019
Net income	$	76,388	$	88,132
Shares:
Weighted-average number of common shares outstanding (for basic calculation)		27,792		27,696
Dilutive stock awards		531		422
Weighted-average number of common shares outstanding (for diluted calculation)		28,323		28,118
Basic earnings per share	$	2.75	$	3.18
Diluted earnings per share	$	2.70	$	3.13

Stock Awards Excluded from the Calculation of Diluted EPS

	Three months ended
	March 31,
	2020		2019
Stock awards subject to performance conditions		90		81
Stock awards that were antidilutive		103		343
Total stock awards excluded from diluted earnings per share		193		424