Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Revolving credit facility	$ 163,957	$ 136,000
Debt:
Long-term debt	169,205
Total debt	5,248	7,673
Less: current portion	(5,248)	(7,673)
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility	$ 163,957	136,000
Debt:
Debt, maturity	June 2024
Suzhou Short-Term Credit Line [Member]
Debt Instrument [Line Items]
Revolving credit facility	$ 3,149	4,521
Debt:
Debt, maturity	May 2022 - October 2022
Maximum [Member] \| Suzhou Short-Term Credit Line [Member]
Debt:
Outstanding credit lines interest rate	4.30%
Minimum [Member] \| Line of Credit [Member]
Debt:
Interest rate	2.40%
Minimum [Member] \| Revolving Credit Facility [Member]
Debt:
Long-term debt, weighted average interest rate	2.40%
Minimum [Member] \| Suzhou Short-Term Credit Line [Member]
Debt:
Outstanding credit lines interest rate	4.00%
Sweden Short-Term Note [Member]
Debt Instrument [Line Items]
Revolving credit facility	$ 2,099	1,591
Debt:
Debt, maturity	January 2022
Outstanding credit lines interest rate	2.60%
PST Short-Term Obligations [Member]
Debt Instrument [Line Items]
Short-term debt		$ 1,561

Amount of short-term and long-term debt and lease obligation.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Fair value of the amount outstanding under the credit facility.

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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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