The following table presents debt balances as of June 30, 2019, and December 31, 2018.



	June 30, 2019		December 31, 2018
Senior Secured Term Loan	$	529,188	$	532,063
Incremental Term Loan	273,000		279,000
Senior Secured Revolver	76,382		38,720
International lines of credit and other loans	9,683		9,810
Total principal	888,253		859,593
Less—current maturities of long-term debt	25,115		31,280
Principal, net of current portion	863,138		828,313
Less—unamortized debt issuance costs	12,762		16,842
Long-term debt, net of current portion	$	850,376	$	811,471