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Debt and Credit Arrangements - Debt and Credit Arrangements (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Short-term debt
Current portion of long-term debt	$ 1,448	$ 1,448
Short-term debt	2,312	2,763
Long-term debt
Total long-term debt	36,046	44,391
Less current portion	(1,448)	(1,448)
Total long-term debt, less current portion	34,598	42,943
Total debt	36,910	45,706
USD Denominated Long-term Debt [Member]
Long-term debt
Total long-term debt	23,133	29,429
Australian Dollar Denominated Long-term Debt [Member]
Long-term debt
Total long-term debt	194	1,081
Brazilian Real Denominated Long-term Debt [Member]
Long-term debt
Total long-term debt	286	0
USD Denominated Long-term Debt at 2.71%, due in 2026 [Member]
Long-term debt
Total long-term debt	12,433	13,881
Thailand Bhat Denominated Secured Notes Short Term Debt [Member]
Short-term debt
Short-term debt	$ 864	$ 1,315

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 944
-SubTopic 210
-Section S99
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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.

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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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Current portion of the total carrying amount as of the balance sheet date due within one year or the operating cycle, if longer, on all notes payable to banks paid on an installment with long term maturities. This can include the amount of any loans from the applicant firm. This does not, however, include any mortgage balances.

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