(7) Bill and Hold (Detail) (USD $) In Millions, unless otherwise specified	19 Months Ended	24 Months Ended
Apr. 01, 2014 T	Apr. 01, 2014 T	Sep. 30, 2012
Tons of Coal Agreed to Store Per Customer		250,000
Tons of Coal Stored	250,000
Tons of Coals Stored Second Customer	70,000
Revenue from Bill and Hold (in Dollars)			$ 14.5

Maximum amount of coal stored at the mine per the agreement with the purchaser.

No definition available.

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