Earnings per Share, Basic and Diluted (Details) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of shares used for basic and diluted earnings per share [Abstract]
Shares used for basic EPS (in shares)	18,862	18,834	17,523
Dilutive effect of stock-based awards (in shares)	72	97	45
Shares used for diluted EPS (in shares)	18,934	18,931	17,568
Stock-based awards not included in diluted per share calculations as they would be anti-dilutive (in shares)	124	7	82

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