Income Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Weighted Average Number of Common Shares Outstanding

The weighted average number of common shares outstanding is calculated as follows (in thousands):

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2018	2017	2018	2017
Weighted average shares outstanding - basic	51,325	51,191	51,281	51,131
Effect of dilutive stock-based compensation	194	185	195	200
Weighted average shares outstanding - diluted	51,519	51,376	51,476	51,331