Changes in Operations Australia (Details)	3 Months Ended		6 Months Ended		1 Months Ended	6 Months Ended		12 Months Ended		3 Months Ended		1 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jul. 31, 2012 Arrium Limited [Member] tons	Jun. 30, 2013 Arrium Limited [Member] Narrow Gauge Locomotives And Wagons [Member] USD ($)	Jun. 30, 2013 Arrium Limited [Member] Narrow Gauge Locomotives And Wagons [Member] AUD	Dec. 31, 2012 Arrium Limited [Member] Narrow Gauge Locomotives And Wagons [Member] USD ($)	Dec. 31, 2012 Arrium Limited [Member] Narrow Gauge Locomotives And Wagons [Member] AUD	Sep. 30, 2012 Cook [Member] USD ($)	Sep. 30, 2012 Cook [Member] AUD	Jun. 30, 2012 Alice Springs Intermodal And Freight Terminal [Member] USD ($)	Jun. 30, 2012 Alice Springs Intermodal And Freight Terminal [Member] AUD	Dec. 31, 2013 Scenario, Forecast [Member] Arrium Limited [Member] Narrow Gauge Locomotives And Wagons [Member] USD ($)	Dec. 31, 2013 Scenario, Forecast [Member] Arrium Limited [Member] Narrow Gauge Locomotives And Wagons [Member] AUD
Tons per year expected to ship					2,700,000
Purchase of property and equipment			$ 112,334,000	$ 106,538,000		$ 15,400,000	16,900,000	$ 54,100,000	52,100,000			$ 9,200,000	9,000,000
Other commitment														4,200,000	4,600,000
Stamp Duty												600,000	500,000
Proceeds from disposition of property and equipment			3,198,000	8,141,000						4,100,000	4,000,000
Gain/(loss) on sale of property and equipment	$ 1,009,000	$ 6,199,000	$ 2,716,000	$ 7,429,000						$ 1,300,000	1,300,000
EPS impact from gain on sale of property and equpment										$ 0.03