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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Net income	$ 3,394	$ 2,606	$ 11,233	$ 9,114
Denominator for basic net income per common share:
Weighted average common shares outstanding (in shares)	12,339	12,230	12,313	12,214
Denominator for diluted net income per share:
Weighted average common shares outstanding (in shares)	12,339	12,230	12,313	12,214
Dilutive effect of stock options and restricted stock (in shares)	261	101	191	98
Diluted weighted average shares (in shares)	12,600	12,331	12,504	12,312
Earnings per common share:
Basic (in USD per share)	$ 0.28	$ 0.21	$ 0.91	$ 0.75
Diluted (in USD per share)	$ 0.27	$ 0.21	$ 0.90	$ 0.74

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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