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Commitments and Contingencies (Narrative) (Details) R$ in Thousands	3 Months Ended		15 Months Ended	64 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($)	May 15, 2017	Mar. 31, 2019 BRL (R$)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 BRL (R$)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Short-term Debt [Line Items]
Environmental remediation accrued undiscounted liability						$ 87,000		$ 111,000
Loss recoveries and insurance gain contingencies									$ 1,644,000
Product warranty and recall accrual						3,083,000		3,283,000
Gain on Business Interruption Insurance Recovery	$ 0	$ 0
Cash proceeds related to damaged inventory and incremental costs	0	241,000
Cash proceeds within cash flows from investing activities	$ 0	$ 1,403,000
Insurance recoveries			$ 0
Letter of Credit [Member]
Short-term Debt [Line Items]
Line of credit						1,489,000
PST Eletronica Ltda [Member]
Short-term Debt [Line Items]
Percentage ownership in consolidated subsidiary				74.00%
PST Eletronica Ltda [Member] | Civil, labor and other tax contingencies [Member]
Short-term Debt [Line Items]
Loss contingency, estimate of possible loss					R$ 31,200	$ 8,000,000	R$ 29,700	$ 7,600,000

X

- Definition

Undiscounted amount of the accrual for environmental loss contingencies.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section S99
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The net amount (to the extent disclosed within this portion of the income statement) by which an insurance settlement exceeds incremental costs incurred from the event causing an interruption of business, plus the insurance award for earnings lost from the event, such as a natural catastrophe, explosion or fire.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

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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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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable.

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Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

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Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

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