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TREASURY STOCK PURCHASE (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Apr. 07, 2013
TREASURY STOCK PURCHASE        
Common stock repurchased $ 8,175,000us-gaap_TreasuryStockValueAcquiredCostMethod $ 67,599,000us-gaap_TreasuryStockValueAcquiredCostMethod $ 737,079,000us-gaap_TreasuryStockValueAcquiredCostMethod  
Number of shares repurchased of common stock from employees in lieu of cash or withholding taxes due 90,000mnst_NumberOfSharesRepurchasedOfCommonStockForEmployeeTaxWithholdingObligations      
Cash payment for repurchase of common stock from employees in lieu of cash or withholding taxes due 8,200,000us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation      
April 2013 Repurchase Plan        
TREASURY STOCK PURCHASE        
Maximum amount of common stock the board of directors authorized to repurchase       200,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ mnst_StockRepurchasesAxis
= mnst_April2013RepurchasePlanMember
Common stock repurchased (in shares) 0us-gaap_TreasuryStockSharesAcquired
/ mnst_StockRepurchasesAxis
= mnst_April2013RepurchasePlanMember		 951,000us-gaap_TreasuryStockSharesAcquired
/ mnst_StockRepurchasesAxis
= mnst_April2013RepurchasePlanMember		    
Average purchase price (in dollars per share)   $ 56.98us-gaap_TreasuryStockAcquiredAverageCostPerShare
/ mnst_StockRepurchasesAxis
= mnst_April2013RepurchasePlanMember		    
Common stock repurchased   $ 54,200,000us-gaap_TreasuryStockValueAcquiredCostMethod
/ mnst_StockRepurchasesAxis
= mnst_April2013RepurchasePlanMember