Earnings Per Share (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic	23,293,228	22,799,816	23,205,628	22,755,651
Incremental Common Shares Attributable to Share-based Payment Arrangements	725,888		728,032	455,774
Weighted Average Number of Shares Outstanding, Diluted	24,019,116	22,799,816	23,933,660	23,211,425
Earnings Per Share Basic	$ 0.23	$ (0.02)	$ 0.40	$ 0.05
Earnings Per Share Diluted	$ 0.23	$ (0.02)	$ 0.39	$ 0.05
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	145,914		321,362	678,412

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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-Name Accounting Standards Codification

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+ Details

- Definition

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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+ 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.

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+ Details