Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table presents instruments which were not dilutive and were excluded from the computation of diluted EPS in each period, as well as the dilutive common stock equivalent shares which were included in the computation of diluted EPS: 

	Three Months Ended   June 30,		Six Months Ended   June 30,
	2018	2017	2018	2017
	(In thousands)
Non-dilutive instruments	140	17	73	26
Dilutive common stock equivalents	91	116	92	108