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Share-Based Payment Arrangements (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
May 26, 2005
Share Based Compensation Arrangement By Share Based Payment Award Incentive Stock Options To Purchase Number Of Shares 1,100,832    
Share Based Compensation Arrangement By Share Based Payment Award Non-qualified Stock Options To Purchase Number Of Shares 319,157    
2005 Long Term Incentive Plan [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     2,000,000
Share Based Compensation Arrangement By Share Based Payment Award Incentive Stock Options To Purchase Number Of Shares 1,100,832    
Share Based Compensation Arrangement By Share Based Payment Award Non-qualified Stock Options To Purchase Number Of Shares 319,157    
Common Stock, Capital Shares Reserved for Future Issuance 564,178    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 0.8    
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Expected To Recognize During Remainder Of Year One 0.1    
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Expected To Recognize During Remainder Of Year Two 0.2    
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Expected To Recognize During Remainder Of Year Three 0.2    
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Expected To Recognize During Remainder Of Year Four 0.2    
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Expected To Recognize During Remainder Of Year Five $ 0.1    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 3.50  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term   6 years 3 months 18 days  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate   38.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate   2.60%  
2005 Long Term Incentive Plan [Member] | Option Issued Prior To 2009 [Member]
     
Stock Based Compensation Incentive Stock Options Percentage Of Grant Under Incentive Plan Year One 10.00%    
Stock Based Compensation Incentive Stock Options Percentage Of Grant Under Incentive Plan Year Two 20.00%    
Stock Based Compensation Incentive Stock Options Percentage Of Grant Under Incentive Plan Year Three 30.00%    
Stock Based Compensation Incentive Stock Options Percentage Of Grant Under Incentive Plan Year Four 40.00%    
2005 Long Term Incentive Plan [Member] | Minimum [Member] | Option Issued Prior To 2009 [Member]
     
Stock Based Compensation Incentive Stock Options Percentage Of Grant Under Incentive Plan Termination Period 5 years    
2005 Long Term Incentive Plan [Member] | Maximum [Member] | Option Issued Prior To 2009 [Member]
     
Stock Based Compensation Incentive Stock Options Percentage Of Grant Under Incentive Plan Termination Period 10 years    
2009 Incentive Stock Options [Member] | 2005 Long Term Incentive Plan [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number 5,000    
2010 Incentive Stock Options [Member] | 2005 Long Term Incentive Plan [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number 25,000    
2011 Incentive Stock Options II [Member] | 2005 Long Term Incentive Plan [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number 10,000    
Non-qualified Stock Options [Member] | 2005 Long Term Incentive Plan [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number 200,000    
Share Based Compensation Arrangement By Share Based Payment Award Options Vested and Expected To Vest Percentage 100.00%