Net Income Per Share (Details)	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Net Income Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic (in shares)	24,210,913	24,839,424
Dilutive stock options (in shares)	117,413	219,839
Dilutive restricted stock units (in shares)	32,124	70,661
Dilutive contingent convertible debt common shares (in shares)	0	0
Number of shares used in diluted computations (in shares)	24,360,450	25,129,924
Antidilutive shares not used in computation pertaining to restricted stock units (in shares)	209,795	93,062

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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+ 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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+ Details