Earnings per Common Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings per Share

The following table reconciles the number of common shares used in calculating the basic and diluted net earnings per share:

	Three Months Ended March 31,
	2018		2017
Basic average common shares outstanding1	16,476,011		16,484,069
Incremental shares due to:
Restricted stock units	27,261		37,494
Performance shares	65,469		72,124
Stock options	8,670		48,688
Diluted average common shares outstanding	16,577,411		16,642,375
Basic net earnings per common share	$	0.16	$	0.46
Diluted net earnings per common share	0.16		0.45
Anti-dilutive shares excluded from calculation	558,319		355,305

¹  Basic average common shares outstanding include restricted stock awards that are fully vested, but are deferred for future issuance.