Accrued Liabilities (Schedule of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Salaries, wages and benefits	$ 54,254	$ 47,178
Pension and postretirement	10,742	5,941
Returns and allowances	9,798	10,560
Contract liabilities	6,959	8,206
Dividends	6,742	6,469
Operating and Financing lease liabilities	5,336	5,871
Contract loss reserve	3,608	11,250
Other tax	9,041	9,866
Freight	4,031	3,474
Professional fees	3,926	3,451
Other	9,888	13,193
Total	$ 124,325	$ 125,459

Accrued Freight, Current

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Contract loss reserve.

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Operating Lease, Liability, Current And Finance Lease, Liability, Current

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Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Current regulatory liabilities generally represent obligations to make refunds to customers for various reasons including overpayment.

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Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as current. Excludes other postretirement benefit plan.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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