Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table provides the weighted average number of common shares outstanding used in the calculation of the Company's basic and diluted earnings per share:

(In thousands, except per share data)	Three Months Ended March 31
	2018		2017
Weighted average number of common shares outstanding, basic	53,515		53,315
Dilutive effect of securities:
Restricted Share Units	82		78
Performance Share Units	66		121
Purchase Match Units	19		21
Weighted average number of common shares outstanding, diluted	53,682		53,535
Effect of dilutive shares on earnings per share	$	—	$	(0.01	)