Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Reconciliation of information used in computing basic and diluted earnings per share

The following table sets forth a reconciliation of the information used in computing basic and diluted earnings per share:

	Three Months Ended March 31,
	2017		2016
Net earnings	$	172,247	$	99,356
Basic earnings per common share:
Net earnings	$	1.11	$	0.64
Weighted average shares outstanding	155,540,000		155,064,000
Diluted earnings per common share:
Net earnings	$	1.09	$	0.64
Weighted average shares outstanding	157,399,000		156,161,000

Reconciliation of share amounts used in computing earnings per share

The following table is a reconciliation of the share amounts used in computing earnings per share:

	Three Months Ended March 31,
	2017	2016
Weighted average shares outstanding - Basic	155,540,000	155,064,000
Dilutive effect of assumed exercise of employee stock options and SARs and vesting of performance shares	1,859,000	1,097,000
Weighted average shares outstanding - Diluted	157,399,000	156,161,000