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



	March 31, 2019		December 31, 2018
Senior Secured Term Loan	$	530,625	$	532,063
Incremental Term Loan	276,000		279,000
Senior Secured Revolver	56,184		38,720
International lines of credit and other loans	10,601		9,810
Total principal	873,410		859,593
Less—current maturities of long-term debt	33,444		31,280
Principal, net of current portion	839,966		828,313
Less—unamortized debt issuance costs	13,692		16,842
Long-term debt, net of current portion	$	826,274	$	811,471