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SUBSEQUENT EVENT (Details) (Subsequent Event, USD $)
In Millions, unless otherwise specified
1 Months Ended
Mar. 03, 2015
Feb. 03, 2015
Subsequent Event [Line Items]    
Percent of assets sold   100.00%mei_DisposalGroupIncludingDiscontinuedOperationPercentofAssetsSold
Minimum    
Subsequent Event [Line Items]    
Pre-tax gain on sale $ 7.3us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss
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= us-gaap_MinimumMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Maximum    
Subsequent Event [Line Items]    
Pre-tax gain on sale $ 7.6us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss
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= us-gaap_MaximumMember
/ us-gaap_SubsequentEventTypeAxis
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