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Stock-Based Compensation (Schedule of Stock Based Compensation Award Activity) (Details)
3 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2013
Apr. 28, 2011
2009 Stock Plan [Member]
Mar. 31, 2013
2009 Stock Plan [Member]
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Available for Grant, Number of Shares [Roll Forward]      
Balance at beginning of period     2,920,000
Authorized   1,500,000 0
Options granted (16,000)   (16,000)
Options forfeited or expired 37,000   37,000
RSUs granted (2,000)   (2,000)
PRSUs forfeited or expired 5,000   5,000
Balance at end of period     2,944,000