Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liabilities	$ (408)	$ (1,754)
Minimum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Maturity of Bank Acceptances	3 months
Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Maturity of Bank Acceptances	6 months
Fair Value, Measurements, Recurring \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	$ 712	397
Derivative Liabilities	(408)	(1,754)
Bank acceptances	16,092	9,690
Rabbi Trust Asset, Fair Value Disclosure	2,554	2,216
Fair value net asset (liability)	18,950	10,549
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	0	0
Derivative Liabilities	0	0
Bank acceptances	0	0
Rabbi Trust Asset, Fair Value Disclosure	2,554	2,216
Fair value net asset (liability)	2,554	2,216
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	712	397
Derivative Liabilities	(408)	(1,754)
Bank acceptances	16,092	9,690
Rabbi Trust Asset, Fair Value Disclosure	0	0
Fair value net asset (liability)	16,396	8,333
Fair Value, Measurements, Recurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	0	0
Derivative Liabilities	0	0
Bank acceptances	0	0
Rabbi Trust Asset, Fair Value Disclosure	0	0
Fair value net asset (liability)	$ 0	$ 0

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- Definition

The fair values as of the Balance Sheet date of Rabbi Trust Assets.

+ References

No definition available.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

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- Definition

Amounts receivable from customers on short-term negotiable time drafts drawn on and accepted by the institution (also known as banker's acceptance transactions) that are outstanding on the reporting date.

+ 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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Fair value of asset after deduction of liability.

+ References

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