Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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Debt and Credit Arrangements - Summary of Outstanding Borrowings (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Nov. 06, 2017
Debt Instrument
Total debt, net of unamortized discount and debt issuance costs	$ 808,400,000	$ 544,400,000
Less: current maturities	(15,900,000)	(11,200,000)
Long-term debt	792,500,000	533,200,000
Foreign facilities
Debt Instrument
Foreign facilities	4,300,000	11,200,000
Revolving Credit Facility \| Credit Facilities 2019
Debt Instrument
Unamortized debt issuance costs	(5,800,000)
Senior secured revolving credit facilities and term loan, net of debt issuance costs	594,000,000.0
Revolving Credit Facility \| Term loan
Debt Instrument
Long term debt	450,000,000.0
Revolving Credit Facility \| Senior secured revolving credit facility
Debt Instrument
Long term debt	149,800,000
Unamortized debt issuance costs	(9,500,000)
Revolving Credit Facility \| Senior secured revolving credit facility due 2022
Debt Instrument
Long term debt		329,300,000
Unamortized debt issuance costs	(2,500,000)
Senior secured revolving credit facilities and term loan, net of debt issuance costs		329,300,000
Convertible Debt \| Convertible Notes, due 2024
Debt Instrument
Unamortized debt issuance costs	(4,000,000.0)	(4,500,000)
Principal amount	258,800,000	258,800,000	$ 258,800,000
Unamortized discount	(44,700,000)	(50,400,000)
Convertible Debt	$ 210,100,000	$ 203,900,000