Effects of Derivative Instruments on Financial Statements (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of (loss)/ gain recognized in other comprehensive loss attributable to MII	$ (52,780)	$ 1,576
Cost of operations
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Income reclassified from AOCI into income: effective portion attributable to MII	1,715	6,213
Gain (loss) on foreign currency - net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain recognized in income: ineffective portion and amount excluded from effectiveness testing attributable to MII	$ 13,247	$ 23,116