(

) Earnings per Common Share

Basic and diluted earnings per common share were computed as follows:

	Three Months				Nine Months
	Ended September 30,				Ended September 30,
(In thousands, except per share amounts)	2018		2017		2018		2017
Numerator:
Net income	$	15,257	$	7,855	$	39,290	$	25,210
Denominator:
Basic earnings per common share - weighted-average shares		54,661		54,517		54,615		54,479
Effect of dilutive stock options		533		373		536		324
Diluted earnings per common share - weighted-average shares and assumed conversions		55,194		54,890		55,151		54,803

Basic earnings per common share	$	0.28	$	0.14	$	0.72	$	0.46
Diluted earnings per common share	$	0.28	$	0.14	$	0.71	$	0.46

Options totaling

119,500

equivalent shares for each of the

three

-month and

nine

-month periods ended

September 30, 2018,

and

142,502

and

419,170

equivalent shares for the

three

-month and

nine

-month periods ended

September 30, 2017,

respectively, were outstanding but were

not

included in the calculation of diluted earnings per share because including the options in the denominator would be antidilutive, or decrease the number of weighted-average shares, due to their exercise prices exceeding the average market price of the common shares, or because inclusion of average unrecognized compensation expense in the calculation would cause the options to be antidilutive.

Unvested performance unit awards totaling

22,646

and

74,987

equivalent shares for the

three

-month and

nine

-month periods ended

September 30, 2018,

respectively, and

118,650

equivalent shares for each of the

three

-month and

nine

-month periods ended

September 30, 2017,

were considered outstanding but were

not

included in the calculation of diluted earnings per share because inclusion of average unrecognized compensation expense in the calculation would cause the performance units to be antidilutive.