Debt - Schedule of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Principal Payments
Total debt	$ 223.7	$ 239.1
Deferred financing costs	(3.4)	(3.5)
Less: Debt payable within one year	2.7	2.3
Long-term debt	$ 221.0	236.8
Senior notes \| 2021 Senior Notes (5.25% fixed rate) due May 2021
Principal Payments
Fixed rate of interest (as a percent)	5.25%
Total debt	$ 175.0	175.0
Line of credit \| Global Revolving Credit Facilities (variable rates) due December 2023
Principal Payments
Total debt	$ 43.4	57.9
Secured debt \| German loan agreement (2.45% fixed rate) due in quarterly installments ending September 2022
Principal Payments
Fixed rate of interest (as a percent)	2.45%
Total debt	$ 4.2	4.8
Secured debt \| German loan agreement (1.45% fixed rate)
Principal Payments
Fixed rate of interest (as a percent)	1.45%
Total debt	$ 4.5	$ 4.9

Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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