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Shareholders’ equity (Tables)

6 Months Ended

Jun. 30, 2014

Stockholders' Equity Note [Abstract]

Common and Preferred Stock Activity

The Common and Preferred Stock Activity table below contains additional information about preferred stock conversions during the six months ended June 30, 2014 and 2013.

Common and Preferred Stock Activity:	Preferred stock			Common stock
(in shares)	Series A convertible			Treasury		Outstanding
Beginning balance as of December 31, 2013	79,620			4,786,521		88,710,277
Conversion of convertible preferred stock	(394	)		—		39,455
Issuance for share-based compensation plans	—			—		55,029
Ending balance as of June 30, 2014	79,226			4,786,521		88,804,761
Beginning balance as of December 31, 2012	80,283			4,786,521		88,548,637
Conversion of convertible preferred stock	(199	)		—		19,864
Issuance for share-based compensation plans	—			—		34,208
Ending balance as of June 30, 2013	80,084			4,786,521		88,602,709

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- Definition

Tabular disclosure of the change in preferred stock, treasury stock and common stock outstanding.

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