Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Narratives) (Details)

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Stockholders' Equity (Narratives) (Details) (USD $)
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares Authorized 15,700,000  
Number of Shares Available for Grant 3,000,000  
Cash Received from Exercise of Stock Options $ 300,000 $ 1,900,000
Stock Options [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options Vested In Period Fair Value 78,000 600,000
Total Intrinsic Value 100,000 1,100,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options 43,000  
Unvested stock options 19,000  
Weighted average period for recognition of unvested shares 1 year  
Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized share-based compensation expense $ 7,400,000  
Unvested restricted stock awards 1,700,000  
Weighted average period for recognition of unvested shares 2 years