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Basis of Presentation and Significant Accounting Policies - Summary of Accounts Receivable Other (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Receivables [Abstract]    
Other taxes receivable $ 31,392mdr_OtherTaxesReceivable $ 14,934mdr_OtherTaxesReceivable
Receivables from unconsolidated affiliates 20,061us-gaap_DueFromAffiliateCurrent 36,181us-gaap_DueFromAffiliateCurrent
Accrued unbilled revenue 15,442us-gaap_UnbilledReceivablesCurrent 15,696us-gaap_UnbilledReceivablesCurrent
Intercompany unbilled cost 3,978us-gaap_UnbilledChangeOrdersAmountExpectedToBeCollectedWithinOneYear 5,373us-gaap_UnbilledChangeOrdersAmountExpectedToBeCollectedWithinOneYear
Employee receivables 4,336us-gaap_DueFromEmployees 4,532us-gaap_DueFromEmployees
Foreign currency forward contracts 1,173mdr_ForeignCurrencyForwardContractsReceivable 11,641mdr_ForeignCurrencyForwardContractsReceivable
Other 4,706mdr_OtherAccountsReceivableCurrent 916mdr_OtherAccountsReceivableCurrent
Accounts receivable-other $ 81,088us-gaap_OtherReceivablesNetCurrent $ 89,273us-gaap_OtherReceivablesNetCurrent