Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reconciling basic to diluted weighted average stock outstanding to diluted weighted average stock outstanding
Basic weighted average stock outstanding	38,170	37,868	38,090	37,779
Dilutive weighted average stock outstanding	39,524	39,330	39,432	39,254
Warrant [Member]
Reconciling basic to diluted weighted average stock outstanding to diluted weighted average stock outstanding
Warrants	1,220	1,238	1,180	1,220
Employee Stock Option [Member]
Reconciling basic to diluted weighted average stock outstanding to diluted weighted average stock outstanding
Employee stock options	93	180	109	201
Restricted Stock Units (RSUs) [Member]
Reconciling basic to diluted weighted average stock outstanding to diluted weighted average stock outstanding
Employee stock options	41	44	53	54

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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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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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.

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