Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2014

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 March 31,
	2014		2013
Earnings:
Net income (numerator for basic and diluted calculations)	$	136,664	$	185,535
Shares:
Weighted average outstanding shares (denominator for basic calculation)	70,574		73,838
Equivalent shares from outstanding stock options	690		551
Denominator for diluted calculation	71,264		74,389
Earnings per share:
Basic	$	1.94	$	2.51
Diluted	$	1.92	$	2.49