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Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Concentration Risk [Line Items]      
Provision for (recovery of) loss on accounts receivable $ 406,000us-gaap_ProvisionForDoubtfulAccounts $ 457,000us-gaap_ProvisionForDoubtfulAccounts $ (836,000)us-gaap_ProvisionForDoubtfulAccounts
Allowance for Doubtful Accounts Receivable 900,000us-gaap_AllowanceForDoubtfulAccountsReceivable 800,000us-gaap_AllowanceForDoubtfulAccountsReceivable 100,000us-gaap_AllowanceForDoubtfulAccountsReceivable
Credit Concentration Risk [Member]      
Concentration Risk [Line Items]      
Provision for (recovery of) loss on accounts receivable $ 400,000us-gaap_ProvisionForDoubtfulAccounts
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember		 $ 500,000us-gaap_ProvisionForDoubtfulAccounts
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember		 $ (800,000)us-gaap_ProvisionForDoubtfulAccounts
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
Customer 1 [Member] | Sales [Member] | Customer Concentration Risk [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 5.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mye_Customer1Member		    
Minimum [Member] | Customer 2 [Member] | Sales [Member] | Customer Concentration Risk [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 3.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mye_Customer2Member
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
Canada [Member] | Sales [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 4.20%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesMember
/ us-gaap_StatementGeographicalAxis
= country_CA		 3.30%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesMember
/ us-gaap_StatementGeographicalAxis
= country_CA		 4.40%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesMember
/ us-gaap_StatementGeographicalAxis
= country_CA
Canada [Member] | Sales [Member] | Customer Concentration Risk [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 6.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_StatementGeographicalAxis
= country_CA