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Defined Contribution Plan (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Defined Contribution Plan [Abstract]      
Required time period for employees for profit sharing plan 3 months    
Maximum employer contribution as a percentage of employee contribution (in hundredths) 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch    
Contribution expense recognized $ 0us-gaap_DefinedContributionPlanCostRecognized $ 0us-gaap_DefinedContributionPlanCostRecognized $ 0us-gaap_DefinedContributionPlanCostRecognized