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Notes Payable (Tables)
12 Months Ended
Dec. 31, 2018
Notes Payable [Abstract]  
Credit Agreement and Notes Payable
Notes payable as of December 31, 2018 and 2017 consisted of the following (in thousands):

  
December 31, 2018
  
December 31, 2017
 
Credit Agreement average effective interest rate of 4.1% inclusive of unused fee
 
$
38,000
  
$
54,000
 
Various notes payable with $1,434 plus accrued interest due in the next year, interest accrues in the range of 3.25% through 5.0% per annum
  
1,836
   
6,772
 
   
39,836
   
60,772
 
Less current portion
  
(1,434
)
  
(4,044
)
Long term portion
 
$
38,402
  
$
56,728
 
Aggregate Annual Payments of Principal Required to Revolving Credit Facility
Aggregate annual payments of principal required pursuant to the Credit Agreement and the various notes payable subsequent to December 31, 2018 are as follows (in thousands):

During the twelve months ended December 31, 2019
 
$
1,434
 
During the twelve months ended December 31, 2020
  
402
 
During the twelve months ended December 31, 2021
  
38,000
 
During the twelve months ended December 31, 2022
  
-
 
  
$
39,836