Earnings per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Numerator:
Net income:	$ 2,690	$ 590
Denominator:
Weighted-average common shares outstanding - basic	12,458,614	12,367,914
Dilutive effect of stock-based compensation plans (in shares)	81,258	137,955
Weighted-average common shares outstanding - diluted	12,539,872	12,505,869
Earnings per share
Net income per share - basic (in dollars per share)	$ 0.22	$ 0.05
Net income per share - diluted (in dollars per share)	$ 0.21	$ 0.05
Stock options
Antidilutive securities excluded from computation of diluted earnings per share
Antidilutive securities excluded from computation of diluted earnings per share (in shares)	427,800	372,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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