Earnings Per Share

6 Months Ended

Jun. 30, 2018

The following table sets forth the computation of basic and diluted earnings per share for the periods indicated:



(Dollars and shares in thousands, except per share amounts)	Three Months Ended				Six Months Ended
(Dollars and shares in thousands, except per share amounts)	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Numerator:
Net income	$	17,329	$	20,896	$	43,465	$	47,928
Denominator:
Weighted-average shares outstanding - basic	18,389		18,140		18,338		18,098
Effect of dilutive shares	271		407		297		362
Weighted-average shares outstanding - diluted	18,660		18,547		18,635		18,460
Basic earnings per share	$	0.94	$	1.15	$	2.37	$	2.65
Diluted earnings per share	$	0.93	$	1.13	$	2.33	$	2.60

Certain potential options to purchase shares may be excluded from the calculation of diluted weighted-average shares outstanding where their exercise price is greater than the average market price of our capital stock during the relevant reporting period. For the three months ended June 30, 2018, 27,145 shares were excluded. For the three months ended June 30, 2017, no shares were excluded.