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Earnings Per Share (Tables)

6 Months Ended

Jun. 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 June 30,								Six months ended June 30,
		2016				2015				2016				2015
Earnings:
Net income (numerator for basic and diluted calculations)		$	236,103			$	130,391			$	312,575			$	255,505
Shares:
Weighted average outstanding shares (denominator for basic calculation)		64,126				66,351				64,348				67,246
Equivalent shares from outstanding stock options		670				769				660				785
Denominator for diluted calculation		64,796				67,120				65,008				68,031
Earnings per share:
Basic		$	3.68			$	1.97			$	4.86			$	3.80
Diluted		$	3.64			$	1.94			$	4.81			$	3.76

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- References

No definition available.

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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