Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Narratives) (Details)

v2.4.0.6
Stockholders' Equity (Narratives) (Details) (USD $)
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 15,700,000  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 3,800,000  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used The fair value of restricted stock awards is determined based on the number of shares granted and the quoted price of our common stock. We use a Black-Scholes-Merton option pricing model to estimate the fair value of stock options issued. The Black-Scholes-Merton option pricing model incorporates various and highly subjective assumptions, including expected term and expected volatility. We have reviewed our historical pattern of option exercises and have determined that meaningful differences in option exercise activity existed among employee job categories. Therefore, we have categorized these awards into two groups of employees for valuation purposes.  
Options granted 0 0
Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period Fair Value $ 558,000 $ 153,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value 1,100,000 264,000
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options 1,900,000 915,000
Stock Options [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized share-based compensation expense 139,000  
Unvested stock options 44,000  
Weighted average period for recognition of unvested shares 1 year 7 months 7 days  
Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized share-based compensation expense $ 5,600,000  
Unvested restricted stock awards 1,100,000  
Weighted average period for recognition of unvested shares 2 years