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PROPERTY AND EQUIPMENT (Details 2) (APSI, Aloha-class dual-fuel capable containership, USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 item | Dec. 31, 2014 | Dec. 31, 2013 item
APSI | Aloha-class dual-fuel capable containership |  |  |
Property and equipment |  |  |
Number of 3,600 twenty-foot equivalent units Aloha-class container ships to be constructed | 2 us-gaap_UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired / us-gaap_CounterpartyNameAxis = matx_AkerPhiladelphiaShipyardIncMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_CapitalAdditionsMember |  | 2 us-gaap_UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired / us-gaap_CounterpartyNameAxis = matx_AkerPhiladelphiaShipyardIncMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_CapitalAdditionsMember
Cost for construction of containerships | $ 418.0 us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases / us-gaap_CounterpartyNameAxis = matx_AkerPhiladelphiaShipyardIncMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_CapitalAdditionsMember |  |
Payments under the agreement |  | $ 0 matx_UnrecordedUnconditionalPurchaseObligationInitialPayment / us-gaap_CounterpartyNameAxis = matx_AkerPhiladelphiaShipyardIncMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_CapitalAdditionsMember | $ 8.4 matx_UnrecordedUnconditionalPurchaseObligationInitialPayment / us-gaap_CounterpartyNameAxis = matx_AkerPhiladelphiaShipyardIncMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_CapitalAdditionsMember

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- Details
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- Definition The amount purchased during the period under an unrecorded unconditional purchase obligation (for example, under the take-or-pay or throughput contract). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
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