Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2019

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				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Weighted average basic common shares      outstanding		44,354		44,203		44,339		44,191
Effect of dilutive securities:
Performance shares		104		205		115		255
Restricted stock		357		85		394		69
Weighted average diluted common and       potential common shares outstanding		44,815		44,493		44,848		44,515