Operating Leases Operating Leases (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 11,249,000
Operating Leases, Future Minimum Payments, Due in Two Years	7,156,000
Operating Leases, Future Minimum Payments, Due in Three Years	5,401,000
Operating Leases, Future Minimum Payments, Due in Four Years	4,109,000
Operating Leases, Future Minimum Payments, Due in Five Years	3,424,000
Operating Leases, Future Minimum Payments, Due Thereafter	0
Operating Leases, Future Minimum Payments Due	31,339,000
Operating Leases, Rent Expense	1,300,000	0
Related Party [Member]
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	9,853,000
Operating Leases, Future Minimum Payments, Due in Two Years	6,972,000
Operating Leases, Future Minimum Payments, Due in Three Years	5,401,000
Operating Leases, Future Minimum Payments, Due in Four Years	4,109,000
Operating Leases, Future Minimum Payments, Due in Five Years	3,424,000
Operating Leases, Future Minimum Payments, Due Thereafter	0
Operating Leases, Future Minimum Payments Due	29,759,000
Operating Leases, Rent Expense	930,000
Equipment Leased to Other Party [Member]
Operating Leased Assets [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	1,396,000
Operating Leases, Future Minimum Payments, Due in Two Years	184,000
Operating Leases, Future Minimum Payments, Due in Three Years	0
Operating Leases, Future Minimum Payments, Due in Four Years	0
Operating Leases, Future Minimum Payments, Due in Five Years	0
Operating Leases, Future Minimum Payments, Due Thereafter	0
Operating Leases, Future Minimum Payments Due	1,580,000
Terminal Facilities [Member]
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense	700,000
Terminal Facilities [Member] | Related Party [Member]
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense	572,000
Gordon Trucking Company, Inc [Member]
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense		$ 0