Earnings Per Share

3 Months Ended

Mar. 31, 2016

Net income per share-basic is calculated as net income available to common stockholders divided by the weighted average number of common shares outstanding during the period, including nonvested restricted stock which has nonforfeitable dividend rights. Net income per share-diluted is calculated as net income available to common stockholders divided by the diluted weighted average number of common shares outstanding during the period. Diluted weighted average number of common shares uses the same weighted average share number as in the basic calculation and adds the potential dilution, if any, that would occur if stock options (or any other contracts to issue common stock) were exercised and resulted in additional common shares outstanding, calculated using the treasury stock method. The numerator is reduced for the effect of preferred dividends in both the basic and diluted net income per share calculations. Weighted average shares-basic and diluted for the three months ended March 31, 2016 and 2015, respectively, are as follows (in thousands):



	Three Months Ended March 31,
	2016	2015
Weighted average shares — basic	210,904	216,568
Dilutive potential common shares — stock options	70	186
Weighted average shares — diluted	210,974	216,754
Weighted average anti-dilutive stock options	1,146	1,553

Stock options are dilutive when the average market price of the Company's stock during the period exceeds the option exercise price. In periods where the Company is in a net loss position, the dilutive effect of stock options is not included in the diluted weighted average shares total.

Anti-dilutive stock options represent stock options which are outstanding but which are not exercisable during the period because the exercise price exceeded the average market value of the Company's stock. These anti-dilutive stock options are not included in the current calculation of dilutive weighted average shares but could be dilutive in the future.