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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Calculation Of Basic And Diluted Earnings Per Share

The calculations of basic and diluted earnings per share for 2016, 2015 and 2014 are:

		2016				2015				2014
Net income		$	333,817			$	331,655			$	318,713
Shares used to compute basic earnings per common share		161,350,000				165,725,000				168,246,000
Dilutive effect of stock options		3,081,000				3,873,000				4,319,000
Shares used to compute diluted earnings per common share		164,431,000				169,598,000				172,565,000
Basic earnings per common share		$	2.07			$	2.00			$	1.89
Diluted earnings per common share		$	2.03			$	1.96			$	1.85

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- References

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

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

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