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Employee Benefit Plans (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Employee Benefit Plans      
Contributions to the Plan $ 750,000 $ 750,000 $ 800,000
Stop loss per insured person 200,000    
Total deferred compensation liability 1,500,000 1,500,000  
Assets related to employee benefit plans $ 1,700,000 $ 2,000,000