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7. Stock Based Compensation Plans (Details)
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Dec. 31, 2010
Stock Options Outstanding 1,205,840 1,358,717 1,430,701 1,223,159
RSA's (Restricted Stock Awards) outstanding 151,093      
Options and RSA's Excercised 1,127,860      
Available Shares 1,901,152      
Total 4,385,945      
2010 ECP
       
Stock Options Outstanding 628,497      
RSA's (Restricted Stock Awards) outstanding 151,093      
Options and RSA's Excercised 903,696      
Available Shares 1,702,659      
Total 3,385,945      
2005 LTIP
       
Stock Options Outstanding 577,343      
RSA's (Restricted Stock Awards) outstanding 0      
Options and RSA's Excercised 224,164      
Available Shares 198,493      
Total 1,000,000