Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2018

Long-Term Debt [Abstract]

Debt Facilities

The following table summarizes the Company’s debt facilities as of December 31, 2017 and 2018:

Facility or Arrangement	Original Principal Amount	Balance as of    December 31, 2017	Balance as of    December 31, 2018(1)(2)	Interest Rate	Repayment terms
October 2014 Credit Agreement term loan facility:
U.S. dollar denominated:	$127.5 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	4.9 billion yen ($43.5 million as of December 31, 2017)	─	Variable 30 day: 2.7595%	Principal amount was paid in full during April 2018.
October 2014 Credit Agreement revolving credit facility:		$47.5 million	─	Variable 30 day: 4.594%	Principal amount was paid in full during April 2018 and credit line was closed.
April 2018 Credit Agreement term loan facility:
	$400.0 million	─	$385.0 million	Variable 30 day: 4.77%	35% of the principal amount is payable in increasing quarterly installments over a five-year period that began on June 30, 2018, with the remainder payable at the end of the five-year term.
April 2018 Credit Agreement revolving credit facility:
		─	$49.5 million	Variable 30 day: 4.77%	Revolving line of credit expires April 18, 2023.
Japan subsidiary loan:	2.0 billion yen	0.7 billion yen ($5.9 million as of December 31, 2017)	─	0.66%	Principal amount was paid in full during July 2018.
Convertible note	$210.0 million	$210.0 million	─	4.75%	Principal amount was paid in full during April 2018.

⁽¹⁾ As of December 31, 2018, the current portion of the Company’s debt (i.e. becoming due in the next 12 months) included $20.0 million of the balance of its U.S. dollar denominated debt under the New Credit Agreement facility. The Company has classified the $49.5 million borrowed under the revolving line of credit as short term because it is 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 a debt issuance costs of $4.0 million, which is not reflected in this table.

Maturities of Long-Term Debt

Maturities of all long-term debt at December 31, 2018, based on the year-end exchange rate, are as follows (U.S. dollars in thousands):

Year Ending December 31,
2019	$	69,455
2020		27,500
2021		30,000
2022		37,500
2023		270,000
Thereafter	─
Total(1)	$	434,455

⁽¹⁾ The carrying value of the debt reflects the amounts stated in the above table less a debt discount of $4.0 million, which is not reflected in this table.