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LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Details 2) - Secured notes payable and capital leases - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Arrangements
Total assets securing notes payable or held under capital leases	$ 100,890	$ 90,640
Less accumulated depreciation and amortization	33,533	26,305
Net assets securing notes payable or held under capital leases	67,357	64,335
Revenue equipment
Financing Arrangements
Total assets securing notes payable or held under capital leases	98,841	88,591
Land and structures (terminals)
Financing Arrangements
Total assets securing notes payable or held under capital leases	1,794	1,794
Service, office, and other equipment
Financing Arrangements
Total assets securing notes payable or held under capital leases	$ 255	$ 255