Earnings Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share Diluted [Line Items]
Weighted average shares used for basic EPS	27,438	30,776	27,465	30,682
Dilutive effect of stock options and other stock-based awards	362	635	428	669
Dilutive effect of convertible debt	737	1,779	844	1,557
Weighted average shares used for diluted EPS	28,537	33,190	28,737	32,908
Stock Options and Other Stock-based Awards [Member]
Earnings Per Share Diluted [Line Items]
Stock options and share-based awards not included in diluted EPS calculation because their effect would be antidilutive	64	115	77	156

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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-URI http://asc.fasb.org/extlink&oid=6528421

+ Details