XML 17 R28.htm IDEA: XBRL DOCUMENT v2.4.1.9
EARNING PER SHARE (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Net Income    
Net Income, Basic $ 25.0us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 3.4us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net Income, Diluted $ 25.0us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted $ 3.4us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Weighted Average Common Shares    
Basic (in shares) 43.4us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 42.9us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of dilutive securities (in shares) 0.5us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 0.4us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Diluted (in shares) 43.9us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 43.3us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Per Common Share Amount, Basic    
Net income (in dollars per share) $ 0.58us-gaap_EarningsPerShareBasic $ 0.08us-gaap_EarningsPerShareBasic
Per Common Share Amount, Diluted    
Effect of dilutive securities (in dollars per shares) $ (0.10)matx_DilutiveSecuritiesEarningsPerShareEffectOnBasicEarningsPerShare  
Net income (in dollars per share) $ 0.57us-gaap_EarningsPerShareDiluted $ 0.08us-gaap_EarningsPerShareDiluted