Derivative Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
Mar. 31, 2018	Apr. 01, 2017
Designated as Hedging Instrument
Derivative
Cash Flow Hedge Ineffectiveness is Immaterial	not material	not material
Designated as Hedging Instrument \| Interest Rate Swaps
Derivative
Notional Amount, Derivative	$ 150,000
Conversion Rate Of Interest Rate Swaps From Variable to Fixed	2.62%
Basis Spread on Variable Rate Derivative	1.38%
Designated as Hedging Instrument \| Foreign Currency Contracts
Derivative
Notional Amount, Derivative	$ 49,153
Designated as Hedging Instrument \| Net Investment Hedge
Derivative
Notional Amount, Derivative	28,722
Not Designated as Hedging Instrument \| Foreign Currency Contracts
Derivative
Notional Amount, Derivative	$ 78,648

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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Period Type:	instant

- Definition

Conversion rate of interest rate swaps.

+ References

No definition available.

+ Details

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Namespace Prefix:	mog_
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Period Type:	instant

- Definition

A disclosure of an assertion that the amount of cash flow hedge ineffectiveness is immaterial.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

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- Details

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- Details

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- Details

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- Details

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