Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

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,
	2013		2012		2013		2012
Earnings:
Net income (loss) (numerator for basic and diluted calculations)	$	137,955	$	144,475	$	273,878	$	408,904
Shares:
Weighted average outstanding shares (denominator for basic calculation)	70,865		73,776		72,342		73,690
Equivalent shares from outstanding stock options	526		362		498		388
Denominator for diluted calculation	71,391		74,138		72,840		74,078
Earnings per share:
Basic	$	1.95	$	1.96	$	3.79	$	5.55
Diluted	$	1.93	$	1.95	$	3.76	$	5.52