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Shareholders’ equity (Tables)

9 Months Ended

Sep. 30, 2013

Stockholders' Equity Note [Abstract]

Schedule of Stockholders Equity

See Common and Preferred Stock Activity table below for additional information about preferred stock conversions during the period.

Common and Preferred Stock Activity:	Preferred stock		Common stock
	Series A convertible		Treasury		Outstanding
Beginning balance as of December 31, 2012	80,283		4,786,521		88,548,637
Conversion of convertible preferred stock	(549	)	—		54,825
Issuance for stock compensation plans	—		—		79,469
Ending balance as of September 30, 2013	79,734		4,786,521		88,682,931

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- Definition

Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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