Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share (in thousands):

	Three Months Ended
	March 31,
	2018	2017
Weighted average basic common shares outstanding	44,179	44,159
Effect of dilutive securities:
Performance shares	231	138
Restricted stock	53	50
Weighted average diluted common and potential common shares outstanding	44,463	44,347