Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Common Share [Abstract]

Computations of basic and diluted earnings per common share

	Years Ended December 31,
	2012		2011		2010
Basic earnings per common share:
Numerator:
Net earnings	$	5,392	$	2,816	$	3,253
Denominator:
Weighted-average common shares outstanding	$	25,566	$	24,634	$	23,906
Basic earnings per common share	$	0.21	$	0.11	$	0.14
Diluted earnings per common share:
Numerator:
Net earnings	$	5,392	$	2,816	$	3,253
Denominator:
Weighted-average common shares outstanding	$	25,566	$	24,634	$	23,906
Incremental shares from stock-based compensation plans		571		395		238
Denominator for diluted earnings per common share	$	26,137	$	25,029	$	24,144
Diluted earnings per common share	$	0.21	$	0.11	$	0.13