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Goodwill and Intangible Assets - Narrative (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Indefinite-lived Intangible Assets [Line Items]      
Amortization of Intangible Assets $ 6,466us-gaap_AmortizationOfIntangibleAssets $ 2,769us-gaap_AmortizationOfIntangibleAssets $ 2,188us-gaap_AmortizationOfIntangibleAssets
Estimated amortization expense, 2015 10,449us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths    
Estimated amortization expense, 2016 10,447us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
Estimated amortization expense, 2017 9,539us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
Estimated amortization expense, 2018 9,086us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
Estimated amortization expense, 2019 8,521us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Trade Names [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Indefinite-lived intangibles $ 11,256us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
$ 2,509us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
 
Minimum [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Weighted average cost of capital 10.00%mye_WeightedAverageCostOfCapital
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Maximum [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Weighted average cost of capital 13.00%mye_WeightedAverageCostOfCapital
/ us-gaap_RangeAxis
= us-gaap_MaximumMember