9.	EARNINGS PER SHARE

Diluted earnings per share reflects the potential dilution that could result if options or other contingently issuable shares were exercised or converted into common stock and notional shares from the Nonqualified Deferred Compensation Plan were granted. Diluted earnings per common share assumes the exercise of stock options using the treasury stock method.

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Amounts in thousands, except per share amounts)	2017		2016		2017		2016
Earnings per common share-basic	$	0.54	$	0.40	$	1.18	$	0.94

Earnings per common share-diluted	$	0.52	$	0.39	$	1.16	$	0.92

Weighted average number of shares outstanding:
Basic common		83,556		82,598		83,459		82,874
Dilutive impact of Equity Incentive Plans:
Common shares		1,971		1,683		1,910		1,551
Diluted common shares		85,527		84,281		85,369		84,425

Diluted earnings per share is computed using the weighted average number of common shares and dilutive potential common shares outstanding during the period. Dilutive potential common shares result from the assumed exercise of outstanding stock options, by application of the treasury stock method that has a dilutive effect on earnings per share. At June 30, 2017 and 2016, 1,820,262 and 2,177,738 stock options, respectively, were outstanding with an exercise price equal to or exceeding the market value of our common stock and were therefore excluded from the computation of shares contingently issuable upon exercise of the options.