Debt and Hedging Instruments (Schedule of Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instruments [Abstract]
Finance lease obligations and other debt	$ 755
Finance lease obligations and other debt		$ 613
Total gross debt	389,011	398,509
Debt discount on Term Loans	(1,739)	(2,669)
Deferred issuance costs on Term Loans	(2,522)	(4,052)
Total debt	384,750	391,788
Less: Current portion	(5,800)	(5,687)
Total long-term debt	378,950	386,101
Foreign debt
Debt Instruments [Abstract]
Long-term debt gross	13,929	15,469
Secured Debt \| First Lien Term Loans
Debt Instruments [Abstract]
Long-term debt gross	284,440	292,540
Secured Debt \| Second Lien Term Loans
Debt Instruments [Abstract]
Long-term debt gross	89,887	89,887
Secured Debt \| Foreign debt
Debt Instruments [Abstract]
Long-term debt gross	$ 13,929	$ 15,469

Finance Lease Liability And Other Long-Term Debt

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- Definition

Long-term Debt, Gross And Lease Obligation

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt discount.

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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 of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, classified as current.

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Amount of long-term debt and lease obligation, including portion classified as current.

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