Earnings per Share (Basic and Diluted) (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 income	$ 3,844	$ 3,000	$ 7,838	$ 6,508
Denominator for basic net income per common share:
Weighted average common shares outstanding (in shares)	12,316	12,216	12,299	12,177
Denominator for diluted net income per share:
Weighted average common shares outstanding (in shares)	12,316	12,216	12,299	12,177
Dilutive effect of stock options and restricted stock (in shares)	202	100	148	97
Diluted weighted average shares (in shares)	12,518	12,316	12,447	12,274
Earnings per common share:
Basic (in USD per share)	$ 0.31	$ 0.25	$ 0.64	$ 0.53
Diluted (in USD per share)	$ 0.31	$ 0.24	$ 0.63	$ 0.53

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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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