Earnings per Share (Basic and Diluted) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Numerator:
Net income	$ 2,606	$ 2,231	$ 9,114	$ 6,736
Denominator for basic net income per common share:
Weighted average common shares outstanding (in shares)	12,230	12,179	12,214	12,151
Denominator for diluted net income per share:
Weighted average common shares outstanding (in shares)	12,230	12,179	12,214	12,151
Dilutive effect of stock options and restricted stock	101	98	98	105
Diluted weighted average shares (in shares)	12,331	12,277	12,312	12,256
Earnings per common share:
Basic (in USD per share)	$ 0.21	$ 0.18	$ 0.75	$ 0.55
Diluted (in USD per share)	$ 0.21	$ 0.18	$ 0.74	$ 0.55

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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