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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2022

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share



	Three months ended						Six months ended
	June 30,						June 30,
	2022			2021			2022			2021
Net income	$	259,942		$	187,974		$	418,236		$	315,075
Shares:
Weighted-average number of common shares outstanding (for basic calculation)		27,905			28,134			27,974			28,130
Dilutive stock awards		187			367			222			412
Weighted-average number of common shares outstanding (for diluted calculation)		28,092			28,501			28,196			28,542
Basic earnings per share	$	9.32		$	6.68		$	14.95		$	11.20
Diluted earnings per share	$	9.25		$	6.60		$	14.83		$	11.04

Stock Awards Excluded from the Calculation of Diluted EPS



	Three months ended						Six months ended
	June 30,						June 30,
	2022			2021			2022			2021
Stock awards subject to performance conditions		64			76			59			73
Stock awards that were antidilutive		184			76			163			62
Total stock awards excluded from diluted earnings per share		248			152			222			135