Short and Long-Term Debt and Commitments Related to Letters of Credit Long-Term Debt (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Debt instrument [Line Items]
Current portion of finance leases	$ 2,459	$ 2,273
Short-term debt	25,268	21,813
Revolving credit facility, maximum borrowing capacity	425,000
Revolving credit facility, noncurrent	46,832	0
Term loans	25,182	21,864
Long-term debt	147,014	96,864
Less debt issuance costs	674	256
Less current portion	22,809	19,540
Long-term debt, excluding current maturities	$ 123,531	77,068
Minimum [Member]
Debt instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.10%
Maximum [Member]
Debt instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.225%
Swing-line borrowings [Member]
Debt instrument [Line Items]
Revolving credit facility, noncurrent	$ 16,832	0
LIBOR borrowings [Member]
Debt instrument [Line Items]
Revolving credit facility, noncurrent	$ 30,000	0
Accounts receivable securitization [Member] \| Base rate, federal funds [Member]
Debt instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
3.99% Senior unsecured notes [Member]
Debt instrument [Line Items]
Senior unsecured notes	$ 50,000	50,000
Letter of credit [Member]
Debt instrument [Line Items]
Letters of credit outstanding	88,362	88,242
Letter of credit [Member] \| Accounts receivable securitization [Member]
Debt instrument [Line Items]
Revolving credit facility, maximum borrowing capacity	100,000
Letters of credit outstanding	$ 83,355	$ 83,355
Letter of credit [Member] \| Accounts receivable securitization [Member] \| Minimum [Member]
Debt instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.35%
Letter of credit [Member] \| Accounts receivable securitization [Member] \| Maximum [Member]
Debt instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.45%
Line of credit [Member]
Debt instrument [Line Items]
Revolving credit facility, noncurrent	$ 49,709
Line of credit [Member] \| LIBOR borrowings [Member]
Debt instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Line of credit [Member] \| Base rate, federal funds [Member]
Debt instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Line of credit [Member] \| Minimum [Member] \| LIBOR borrowings [Member]
Debt instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.875%
Line of credit [Member] \| Maximum [Member] \| LIBOR borrowings [Member]
Debt instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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No definition available.

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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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Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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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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- Definition

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.

+ References

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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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- Definition

Carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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