Note 10. Debt

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


	March 31, 2018		December 31, 2017
$545.0 million Senior Secured Term Loan B (“Senior Secured Term Loan”) bearing interest at the greater of 0.75% or one-month LIBOR (1.88% at March 31, 2018), plus an applicable margin of 3.75% at March 31, 2018, expiring October 19, 2022	$	534,250	$	534,250
$300.0 million Incremental Term Loan (“Incremental Term Loan”) bearing interest at one-month LIBOR (1.88% at March 31, 2018), plus an applicable margin of 3.25% at March 31, 2018, expiring April 3, 2021		288,000		291,000
$143.0 million Senior Secured Revolver (“Senior Secured Revolver”) bearing interest at one-month LIBOR (1.88% at March 31, 2018) plus an applicable margin of 3.5% at March 31, 2018, expiring October 19, 2020		—		—
French Safeguard Obligations		299		290
Brazilian lines of credit and equipment notes		207		257
Chinese line of credit, bearing interest		2,868		2,768

Total		825,624		828,565
Less current maturities of long-term debt		18,796		17,283

Principal, net of current portion		806,828		811,282
Less unamortized debt issuance costs		19,390		20,477

Long-term debt, net of current portion	$	787,438	$	790,805

We capitalized interest costs amounting to $0.2 million and $0.4 million in the three-months ended March 31, 2018, and 2017, related to construction in progress.