Long-term Debt Schedule of Future Payments Including Capital Leases (Details)		12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2013 FreightLink [Member] Non interest bearing note [Member] USD ($)	Dec. 31, 2013 FreightLink [Member] Non interest bearing note [Member] AUD	Dec. 01, 2010 FreightLink [Member] Non interest bearing note [Member] USD ($)
Long-term Debt, Unclassified [Abstract]
Debt Instrument, Face Amount		$ 44,600,000	50,000,000	$ 48,200,000
Schedule of Future Payments Including Capital Leases [Line Items]
2014	84,366,000
2015	106,022,000
2016	112,407,000
2017	1,320,643,000
2018	319,000
Thereafter	44,759,000
Total	1,668,516,000
Debt Instrument, Face Amount		44,600,000	50,000,000	48,200,000
Debt instrument, maturity date		Jan. 14, 2054	Jan. 14, 2054
Long-term debt		$ 2,000,000	2,300,000