Earnings per Share (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Weighted average shares and share equivalents to calculate basic and diluted earnings per share
Weighted average number of shares outstanding used to calculate basic EPS	5,106,000	5,785,000	5,075,000	5,804,000
Dilutive securities:
Stock options and restricted share units	115,000	144,000	116,000	170,000
Weighted average number of shares and share equivalents used to calculate diluted EPS	5,221,000	5,929,000	5,191,000	5,974,000
Earnings Per Share (Textual) [Abstract]
Stock options and restricted share units issued under equity benefit plans	160,672	449,134	479,807	448,810

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