Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share Basic And Diluted By Common Class [Text Block]

The following table sets forth the computation of basic and diluted earnings per share on net income (in thousands, except per share information):

	Three months ended September 30,				Nine months ended September 30,
	2016		2015		2016		2015
Earnings:
Net income (numerator for basic and diluted calculations)	$	198,719	$	83,534	$	511,294	$	339,039
Shares:
Weighted average outstanding shares (denominator for basic calculation)	64,146		66,205		64,281		66,895
Equivalent shares from outstanding stock options	669		677		663		749
Denominator for diluted calculation	64,815		66,882		64,944		67,644
Earnings per share:
Basic	$	3.10	$	1.26	$	7.95	$	5.07
Diluted	$	3.07	$	1.25	$	7.87	$	5.01