Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Summary of Debt

The following table presents outstanding debt balances as of December 31, 2018 and 2017.

	As of December 31,
	2018		2017
Senior Secured Term Loan	$	532,063	$	534,250
Incremental Term Loan	279,000		291,000
Senior Secured Revolver	38,720		—
International lines of credit and other loans	9,810		3,315
Total principal	859,593		828,565
Less—current maturities of long-term debt	31,280		17,283
Principal, net of current portion	828,313		811,282
Less—unamortized debt issuance costs	16,842		20,477
Long-term debt, net of current portion	$	811,471	$	790,805

Aggregate Maturities of Long-Term Debt

The following table lists aggregate maturities of long-term debt for the next five years and thereafter.

Year Ending December 31,	Aggregate Maturities Principal Amounts
2019	$	31,280
2020	50,097
2021	261,094
2022	515,157
2023	344
Thereafter	1,621
Total outstanding principal	$	859,593