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Derivative Financial Instruments (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 3 Months Ended
Mar. 29, 2014
Apr. 04, 2015
Apr. 04, 2015
Derivative [Line Items]      
Cash Flow Hedge Ineffectiveness is Immaterial not material    
Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Cash Flow Hedge Ineffectiveness is Immaterial   not material  
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]      
Derivative [Line Items]      
Notional Amount, Derivative   245,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
$ 245,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Conversion Rate Of Interest Rate Swaps From Variable to Fixed   2.30%mog_ConversionRateOfInterestRateSwapsFromVariableToFixed
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
2.30%mog_ConversionRateOfInterestRateSwapsFromVariableToFixed
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Basis Spread on Variable Rate     163.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Minimum [Member]      
Derivative [Line Items]      
Maturity of Interest Rate Swaps   Jan. 15, 2016  
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Maximum [Member]      
Derivative [Line Items]      
Maturity of Interest Rate Swaps   Jun. 05, 2017  
Designated as Hedging Instrument [Member] | Foreign Currency Forwards [Member]      
Derivative [Line Items]      
Notional Amount, Derivative   60,714invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
60,714invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Maturity of Interest Rate Swaps   Dec. 29, 2016  
Not Designated as Hedging Instrument [Member] | Foreign Currency Forwards [Member]      
Derivative [Line Items]      
Notional Amount, Derivative   131,051invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
$ 131,051invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember