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DEBT (Tables)
 3 Months Ended
Mar. 31, 2018
DEBT [Abstract]  
Debt Facilities
The following table summarizes the Company's debt facilities as of March 31, 2018 and December 31, 2017:
Facility or
  Arrangement
 
Original
Principal Amount
 
Balance as of
March 31, 2018(1)(2)
 
Balance as of
December 31, 2017
 
Interest Rate
 
Repayment terms
           
Credit Agreement term loan facility:
          
           
 U.S. dollar
denominated:
 
$127.5 million
 
 
$90.8 million
 
 
$94.8 million
 
 
Variable 30 day:
4.627%
 
Principal amount was paid in full during April 2018.
           
Japanese yen
denominated:
 
6.6 billion yen
 
4.7 billion yen ($44.2 million as of March 31, 2018)
 
4.9 billion yen ($43.5 million as of December 31, 2017)
 
Variable 30 day:
2.7595%
 
Principal amount was paid in full during April 2018.
           
Credit Agreement revolving credit facility:   
$122.5 million
 
$47.5 million
 
Variable 30 day:
4.594%
 
Principal amount was paid in full during April 2018.
           
Japan subsidiary loan:
 
2.1 billion yen
 
0.4 billion yen ($4.1 million as of March 31, 2018)
 
0.7 billion yen ($5.9 million as of December 31, 2017)
 
0.66%
 
Payable in semi-annual installments over three years that began on January 31, 2016.
           
Convertible note
 
$210.0 million
 
$210.0 million
 
$210.0 million
 
4.75%
 
Principal amount was paid in full during April 2018.


(1)
As of March 31, 2018, the current portion of the Company's debt (i.e. becoming due in the next 12 months) included $17.5 million of the balance of its U.S. dollar denominated debt under the Credit Agreement facility, $8.5 million of the balance of its Japanese yen-denominated debt under the Credit Agreement facility, $4.1 million of the Japan subsidiary loan and the $210.0 million convertible note. The Company classified the $122.5 million borrowed under the revolving line of credit as short term because it was the Company's intention to use the line of credit to borrow and pay back funds over short periods of time.

(2)
The carrying value of the debt reflects the amounts stated in the above table less debt issuance costs of $1.7 million related to the Credit Agreement, which is not reflected in this table.