Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Weighted-Average Number of Shares of Common Stock Used to Calculate Basic and Diluted Earnings Per Share

The table below presents the weighted-average number of shares of common stock used to calculate basic and diluted earnings per share:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Weighted-average number of shares of common stock for    calculating basic earnings per share		24,172		24,015		24,128		23,984
Effect of potentially dilutive securities from equity-based    compensation		391		213		422		217
Weighted-average number of shares of common stock for    calculating diluted earnings per share		24,563		24,228		24,550		24,201

Securities Not Included in Computation of Diluted Earnings Per Share

The following securities were not included in the computation of diluted earnings per share as their effect would have been anti-dilutive:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017			2018		2017
Options to purchase shares of common stock		—		14			—		14