Net Earnings Per Share Net Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Net Earnings Per Share

The following table sets forth the reconciliation of the numerator and denominator utilized in the computation of basic and diluted earnings per share (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Numerator for earnings per share:
Net earnings for basic and diluted earnings per share	$	71,563	$	51,413	$	110,758	$	93,984
Denominator for earnings per share:
Weighted average number of common shares outstanding	137,749		136,865		138,124		136,613
Assumed exercise of stock options and vesting of restricted stock awards, net of shares assumed reacquired under the treasury stock method	2,400		1,584		2,440		1,653
Diluted shares outstanding	140,149		138,449		140,564		138,266