Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings per Share

The following table sets forth the computation of basic and diluted earnings per share:

Year Ended December 31 (in thousands except per share data)	2016		2015		2014
Numerator:
Net income	$	47,346	$	46,432	$	43,251
Denominator:
Basic earnings per share:
Weighted average shares		17,548		17,431		17,326
Diluted earnings per share:
Dilutive effect of equity grants		18		52		71
Adjusted weighted average shares		17,566		17,483		17,397
Earnings per share:
Basic earnings per share	$	2.70	$	2.66	$	2.50
Diluted earnings per share		2.70		2.66		2.49