Earnings Per Share

12 Months Ended

Dec. 31, 2015

The following is a reconciliation of the average shares outstanding used to compute basic and diluted earnings per share:



	2015	2014	2013
Basic weighted average common shares outstanding	136,036,192	134,934,892	132,894,179
Effect of dilutive securities - stock awards	1,397,623	2,416,417	2,436,014
Diluted weighted average common shares outstanding	137,433,815	137,351,309	135,330,193

For the years ended December 31, 2015, 2014, and 2013, 2.8 million, 1.2 million, and 2.3 million, respectively, of common shares issuable upon the exercise of stock options were anti-dilutive and were excluded from the calculation of diluted earnings per share.