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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share



	Three months ended						Six months ended
	June 30,						June 30,
	2023			2022			2023			2022
Net income	$	341,790		$	259,942		$	633,434		$	418,236
Shares:
Weighted-average number of common shares outstanding (for basic calculation)		27,604			27,905			27,614			27,974
Dilutive stock awards		143			187			154			222
Weighted-average number of common shares outstanding (for diluted calculation)		27,747			28,092			27,768			28,196
Basic earnings per share	$	12.38		$	9.32		$	22.94		$	14.95
Diluted earnings per share	$	12.32		$	9.25		$	22.81		$	14.83

Stock Awards Excluded from the Calculation of Diluted EPS



	Three months ended						Six months ended
	June 30,						June 30,
	2023			2022			2023			2022
Stock awards subject to performance conditions		57			64			53			59
Stock awards that were antidilutive		67			184			110			163
Total stock awards excluded from diluted earnings per share		124			248			163			222