Capital Stock

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

Capital Stock

(10) CAPITAL STOCK

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. We currently have no preferred stock issued or outstanding. The following is a schedule of changes in the number of common shares outstanding since the beginning of 2015:

	Nine Months Ended September 30, 2016			Year Ended December 31, 2015
Beginning balance		169,316,460			168,628,177
Memorial Merger		77,042,749			—
SARs exercised		—			77,002
Restricted stock grants		464,428			335,103
Restricted stock units vested		263,047			252,507
Shares retired		(739	)		—
Treasury shares issued		14,511			23,671
Ending balance		247,100,456			169,316,460