Ohio River Terminal (Details) (Ohio River Terminal [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2014 mi acre	May 31, 2013
Ohio River Terminal [Member]
Terminal purchased		$ 2.8
Secured area available	17
Ohio River terminal mile point location	743.8

The value of all consideration given or received by the Entity in the significant acquisition or disposal.

No definition available.

Name:	us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant