(2) Bill and Hold (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended		24 Months Ended
	Jun. 30, 2013 T	Sep. 30, 2013 T	Jun. 01, 2013	Apr. 02, 2013	Jun. 01, 2014 T	Apr. 01, 2014 T
Policy Text Block [Abstract]
Tons of Coal Agreed to Store Per Customer						250,000
Tons of Coal Agreed to Store Per Customer - Second Customer					250,000
Minimum Storage Period			1 year	1 year
Maximum Storage Period					2 years	2 years
Increase Decrease In Coal In Storage	50,000
Increase Decrease In Coal Stored - First Customer		145,000
Revenue from Bill and Hold (in Dollars)		$ 7.3
Tons of Coal Stored for First Customer at Reporting Date		300,000
Tons of Coal Stored for Second Customer at Reporting Date		250,000