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Borrowings (Tables)
 6 Months Ended
Jun. 30, 2018
Debt Disclosure [Abstract]  
Key details of the term loans
Key details of the term loans are as follows:
Description
 
June 30, 2018(1)
 
December 31, 2017(1)
 
 
 
 
 
Term loan, face value(2)
 
$
399,000

 
$
349,125

Unamortized debt discount(3)
 
(4,037
)
 
(3,321
)
Unamortized debt issuance costs(3)
 
(6,984
)
 
(7,541
)
Term loan
 
$
387,979

 
$
338,263


(1) 
Amounts reported reflect details of the original term loan as of December 31, 2017, and details of the modified term loan as of June 30, 2018.
(2) 
The principal balance of the original term loan was scheduled to be repaid on a quarterly basis at an amortization rate of 0.25% per quarter. We made the first principal payment in December 2017. The principal balance of the modified term loan is scheduled to be repaid on a quarterly basis at an amortization rate of 0.25% per quarter, with the balance due at maturity. We made the first principal payment on the modified term loan in June 2018. For each of the next five years, principal repayments on the modified term loan are expected to be $4,000.
(3) 
For the three months ended June 30, 2018 and 2017, $155 and $0 of debt discount and $268 and $0 of debt issuance costs, respectively, were amortized into interest expense in the Unaudited Consolidated Statements of Operations. For the six months ended June 30, 2018 and 2017, $283 and $0 of debt discount and $557 and $0 of debt issuance costs, respectively, were amortized into interest expense in the Unaudited Consolidated Statements of Operations.