Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Basic and Diluted Earnings per share

The following table sets forth the calculation of EPS for the three months endedMarch 31, 2018 and 2017.

	Three Months Ended March 31,
	2018		2017
	(In thousands, except per share amounts)
Weighted average basic common shares outstanding	20,298		20,692
Dilutive effect of employee stock purchases, net of assumed repurchase of treasury stock	9		6
Weighted average dilutive common shares outstanding	20,307		20,698
Basic:
Net Income	$	35,814	$	33,939
Less: Earnings allocated to participating securities	1,209		1,250
Earnings available to basic common shares	$	34,605	$	32,689
Basic earnings per common share	$	1.70	$	1.58
Diluted:
Net Income	$	35,814	$	33,939
Less: Earnings allocated to participating securities	1,208		1,250
Earnings available to diluted common shares	$	34,606	$	32,689
Diluted earnings per common share	$	1.70	$	1.58