Debt (Schedule of Long-term Debt and Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument
Long-term debt, gross	$ 188,919	$ 186,060
Less current portion	0	0
Total excluding current portion	188,919	186,060
Debt issuance costs	$ 3,500	$ 4,400
Long-term debt, weighted average interest rate	3.25%	3.25%
Other long-term liabilities	$ 47,636	$ 56,415
2019	0
2020	0
2021	0
2022	199,500
2023	0
Revolving Credit Facility
Debt Instrument
Long-term debt, gross	0	0
Convertible Notes
Debt Instrument
Long-term debt, gross	188,919	186,060
Finance Lease Obligations [Member]
Debt Instrument
Other long-term liabilities	$ 4,300	$ 5,600

Long-term Debt, Current Maturities before debt issuance costs

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- Definition

Long-term debt, gross, excluding current maturities

+ References

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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.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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 payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

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Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

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