Leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Leases, Operating [Abstract]
2014	$ 1,588
2015	595
Total	2,183
Lease expiration date	Jun. 10, 2015
Rental expense under non-cancelable revenue equipment operating leases	$ 1,593	$ 1,620