Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share Basic And Diluted By Common Class [Table 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):

	2013		2012		2011
Earnings:
Net income (numerator for basic and diluted calculations)	$	418,837	$	631,893	$	546,045
Shares:
Weighted average outstanding shares (denominator for basic calculations)	71,917		73,737		73,586
Equivalent shares from outstanding stock options	544		416		522
Diluted shares (denominator for diluted calculations)	72,461		74,153		74,108
Earnings per share:
Basic	$	5.82	$	8.57	$	7.42
Diluted	$	5.78	$	8.52	$	7.37