Earnings per Share Earnings per Share (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common Stock, Shares, Outstanding	8,815,234	8,722,456	8,815,234	8,722,456	8,755,398
Weighted Average Number of Shares Outstanding, Basic	8,667,440	8,600,905	8,659,176	8,589,949
Diluted (in shares)	8,805,338	8,710,043	8,793,176	8,702,083
Basic (in dollars per share)	$ 0.48	$ 0.41	$ 0.70	$ 0.67
Incremental Common Shares Attributal To Share Based Payements Arrangements	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.01)
Earnings Per Share, Diluted	$ 0.47	$ 0.40	$ 0.69	$ 0.66

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References+ Details

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

+ References

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+ Details

- Definition

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.

+ References+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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-Glossary Weighted-Average Number of Common Shares Outstanding

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+ Details