Changes in Operations United States RCP&E (Details) (RCP&E [Member], USD $)	0 Months Ended	3 Months Ended
	May 30, 2014	Sep. 30, 2014	May 30, 2014 employee carload mile
RCP&E [Member]
Cash purchase price	$ 217,700,000
RCP&E additional purchase price		900,000
Track miles			670
Carloads shipped annually			52,000
Number of employees			180
Purchase Price Allocations [Abstract]
Materials and supplies			3,621,000
Prepaid expenses and other			116,000
Property and equipment			217,032,000
Deferred income tax assets			325,000
Total assets			221,094,000
Current portion of long-term debt			1,121,000
Accrued expenses			108,000
Long-term debt, less current portion			1,260,000
Net assets			$ 218,605,000