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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Stock Awards Excluded from the Calculation of Diluted EPS



	Three months ended						Nine months ended
	September 30,						September 30,
	2018			2017			2018			2017
Stock awards subject to performance conditions		108			245			103			244
Stock awards that were antidilutive		1,164			1,738			1,817			1,567
Total stock awards excluded from diluted earnings per share		1,272			1,983			1,920			1,811

Basic and Diluted Earnings Per Share



	Three months ended						Nine months ended
	September 30,						September 30,
	2018			2017			2018			2017
Net income	$	38,204		$	19,610		$	144,534		$	132,460
Shares:
Weighted-average number of common shares outstanding		27,802			28,415			27,844			28,604
Dilutive stock awards		215			24			123			92
Diluted weighted-average number of common shares outstanding		28,017			28,439			27,967			28,696
Basic earnings per share	$	1.37		$	0.69		$	5.19		$	4.63
Diluted earnings per share	$	1.36		$	0.69		$	5.17		$	4.62