Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings per Share

A reconciliation of basic and diluted shares follows (in thousands):

	Three months ended March 31,
	2013	2012
Average common shares outstanding - basic	123,222	122,725
Effect of dilutive securities - share-based compensation	980	1,071
Average common shares - diluted	124,202	123,796

Antidilutive Securities Excluded From Earnings per Share

Share options and appreciation rights granted under share-based compensation plans are antidilutive and excluded from diluted earnings per share when their exercise or strike price exceeds the average stock market price during the period. The following table sets forth antidilutive shares excluded from diluted earnings per share. Such securities could potentially dilute earnings per share in the future (in thousands):

	Three months ended March 31,
	2013	2012
Employee and director share options	42	42
Share appreciation rights	1,022	590
Total potentially dilutive shares	1,064	632