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Notes Payable - Summary of Notes Payable (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Payments/Long term debt, Total $ 49,110 $ 35,617
Less current portion (775) (883)
Long term portion 48,335 34,734
Credit Facility [Member]    
Debt Instrument [Line Items]    
Payments/Long term debt, Total $ 44,000 34,500
Average effective interest rate 2.50%  
3.25 % through 3.5 % notes payable due in next year [Member]    
Debt Instrument [Line Items]    
Payments/Long term debt, Total $ 5,110 $ 1,117
Annual installments $ 775  
Percentage of interest accrued, minimum 3.25%  
Percentage of interest accrued, maximum 3.50%