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Share-Based Payment Arrangements (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Dec. 31, 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  
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 5 years 8 months 12 days  
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  
2011 Incentive Stock Options I [Member] | 2005 Long Term Incentive Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 5,000  
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 10 years  
2010 Incentive Stock Options [Member] | 2005 Long Term Incentive Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 25,000  
2011 Incentive Stock Options II [Member] | 2005 Long Term Incentive Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 10,000  
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 10 years  
Non-qualified Stock Options [Member] | 2005 Long Term Incentive Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 200,000  
Share Based Compensation Arrangement By Share Based Payment Award Options Vested and Expected To Vest Percentage 100.00%  
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 10 years