Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Numerator
Numerator for basic and diluted earnings per share - Net income attributable to common stockholders	$	15,008	$	45,310	$	23,292	$	75,872
Denominator
Denominator for basic earnings per share - weighted average shares outstanding	50,436		52,796		50,636		52,815
Effect of dilutive securities - stock options and other stock units	154		395		247		542
Denominator for diluted earnings per share - adjusted weighted average shares outstanding	50,590		53,191		50,883		53,357
Earnings per share:
Basic	$	0.30	$	0.86	$	0.46	$	1.44
Diluted	$	0.30	$	0.85	$	0.46	$	1.42