Income Per Share (Tables)

6 Months Ended

Jun. 30, 2017

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 June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Weighted average shares outstanding - basic		51,154		50,977		51,100		51,011
Effect of dilutive stock-based compensation		180		244		216		285
Weighted average shares outstanding - diluted		51,334		51,221		51,316		51,296