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



	September 30, 2019		December 31, 2018
Senior Secured Term Loan	$	527,750	$	532,063
Incremental Term Loan	270,000		279,000
Senior Secured Revolver	71,323		38,720
International lines of credit and other loans	9,897		9,810
Total principal	878,970		859,593
Less—current maturities of long-term debt	25,601		31,280
Principal, net of current portion	853,369		828,313
Less—unamortized debt issuance costs	11,621		16,842
Long-term debt, net of current portion	$	841,748	$	811,471