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Repurchases Of Common Stock (Tables) | 9 Months Ended
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Sep. 30, 2015
Repurchases Of Common Stock [Abstract] |
Schedule Of Common Stock Repurchases |
|  | For the Three Months Ended |  | For the Nine Months Ended
|  | September 30, |  | September 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
Shares repurchased 1 |  |  | 1,213 |  |  | 4,393 |  |  | 4,345 |  |  | 7,492
Total cost of shares repurchased |  | $ | 85,975 |  | $ | 272,342 |  | $ | 313,083 |  | $ | 468,968
Average cost per share 1 |  | $ | 70.89 |  | $ | 61.99 |  | $ | 72.05 |  | $ | 62.59
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| (1) |  | Shares repurchased and acquired through employee surrender for payment of minimum required withholding taxes on and before June 15, 2015 and the associated average cost per share have been adjusted to reflect the June 2015 two-for-one stock split. Actual shares repurchased were approximately 2,962,000 for the nine months ended September 30, 2015, and approximately 2,197,000 and 3,746,000 for the three and nine months ended September 30, 2014, respectively.

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 + Details
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