Capital Stock (Tables)

12 Months Ended

Dec. 31, 2015

We have authorized capital stock of 485.0 million shares, which includes 475.0 million shares of common stock and 10.0 million shares of preferred stock. The following is a schedule of changes in the number of common shares outstanding since the beginning of 2013:


	Year Ended December 31,
	2015		2014		2013
Beginning balance		168,628,177		163,342,894		162,514,098
Equity offering		−		4,560,000		−
Stock options/SARs exercised		77,002		195,242		278,916
Restricted stock grants		335,103		270,062		401,122
Restricted stock units vested		252,507		244,413		119,480
Treasury shares		23,671		15,566		29,278
Ending balance		169,316,460		168,628,177		163,342,894