Earnings Per Common Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Net earnings	$ 1,831	$ 1,002	$ 1,334	$ 1,294
Denominator:
Weighted-average common shares outstanding (shares)	29,053	25,257	28,912	25,283
Basic earnings (loss) per common share (usd per share)	$ 0.06	$ 0.04	$ 0.05	$ 0.05
Numerator:
Net earnings	$ 1,831	$ 1,002	$ 1,334	$ 1,294
Denominator:
Weighted-average common shares outstanding (shares)	29,053	25,257	28,912	25,283
Incremental shares from stock-based compensation plans (shares)	383	552	454	504
Denominator for diluted earnings (loss) per common share (shares)	29,436	25,809	29,366	25,787
Diluted earnings (loss) per common share (usd per share)	$ 0.06	$ 0.04	$ 0.05	$ 0.05