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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share



	Three months ended						Six months ended
	June 30,						June 30,
	2019			2018			2019			2018
Net income	$	91,028		$	46,884		$	179,160		$	106,330
Shares:
Weighted-average number of common shares outstanding		27,720			27,819			27,708			27,865
Dilutive stock awards		580			116			501			77
Diluted weighted-average number of common shares outstanding		28,300			27,935			28,209			27,942
Basic earnings per share	$	3.28		$	1.69		$	6.47		$	3.82
Diluted earnings per share	$	3.22		$	1.68		$	6.35		$	3.81

Stock Awards Excluded from the Calculation of Diluted EPS



	Three months ended						Six months ended
	June 30,						June 30,
	2019			2018			2019			2018
Stock awards subject to performance conditions		84			108			83			100
Stock awards that were antidilutive		175			2,061			259			2,144
Total stock awards excluded from diluted earnings per share		259			2,169			342			2,244