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NOTES PAYABLE AND AMENDED CREDIT AGREEMENT (Tables)
 3 Months Ended
Mar. 31, 2018
NOTES PAYABLE AND AMENDED CREDIT AGREEMENT [Abstract]  
Summary of Credit Agreement and Notes Payable
Amounts outstanding under the Amended Credit Agreement and notes payable as of March 31, 2018 and December 31, 2017 consisted of the following (in thousands):

  
March 31, 2018
  
December 31, 2017
 
Credit Agreement average effective interest rate of 3.8% inclusive of unused fee
 
$
42,000
  
$
54,000
 
Various notes payable with $5,317 plus accrued interest due in the next year, interest accrues in the range of 3.25% through 4.25% per annum
  
6,099
   
6,772
 
   
48,099
   
60,772
 
Less current portion
  
(5,317
)
  
(4,044
)
Long term portion
 
$
42,782
  
$
56,728
 
Summary of Aggregate Annual Payments of Principal Required to Revolving Credit Facility
Aggregate annual payments of principal required pursuant to the Amended Credit Agreement and the above notes payable subsequent to March 31, 2018 are as follows (in thousands):

During the twelve months ended March 31, 2019
 
$
5,317
 
During the twelve months ended March 31, 2020
  
782
 
During the twelve months ended March 31, 2021
  
-
 
During the twelve months ended March 31, 2022
  
42,000
 
  
$
48,099