Earnings Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Reconciling basic to diluted weighted average stock outstanding to diluted weighted average stock outstanding
Basic weighted average stock outstanding	34,990	30,742
Dilutive weighted average stock outstanding	36,743	32,129
Warrants [Member]
Reconciling basic to diluted weighted average stock outstanding to diluted weighted average stock outstanding
Warrants	38	893
Employee stock options [Member]
Reconciling basic to diluted weighted average stock outstanding to diluted weighted average stock outstanding
Employee stock options	473	453
Restricted stock units [Member]
Reconciling basic to diluted weighted average stock outstanding to diluted weighted average stock outstanding
Employee stock options	1,242	41

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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+ Details