OPERATING SEGMENT DATA (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
OPERATING REVENUES
Operating revenues	$ 520,687	$ 440,867
OPERATING EXPENSES AND COSTS
Gain on sale of property and equipment	(212)	(285)
Operating expenses and costs	544,037	463,854
OPERATING INCOME (LOSS)
Operating income (loss)	(23,350)	(22,987)
OTHER INCOME (EXPENSE)
Interest and dividend income	171	253
Interest expense and other related financing costs	(1,207)	(1,142)
Other, net	1,083	1,340
Other income (expense), net	47	451
LOSS BEFORE INCOME TAXES	(23,303)	(22,536)
Freight Transportation
OPERATING REVENUES
Operating revenues	407,281	396,513
OPERATING EXPENSES AND COSTS
Salaries, wages, and benefits	267,178	265,061
Fuel, supplies, and expenses	83,332	80,640
Operating taxes and licenses	10,990	10,801
Insurance	4,484	4,881
Communications and utilities	3,933	3,799
Depreciation and amortization	19,574	18,573
Rents and purchased transportation	38,469	33,216
Gain on sale of property and equipment	(212)	(282)
Other	2,082	1,682
Operating expenses and costs	429,830	418,371
OPERATING INCOME (LOSS)
Operating income (loss)	(22,549)	(21,858)
Premium Logistics and Expedited Freight Services
OPERATING REVENUES
Operating revenues	53,252
OPERATING EXPENSES AND COSTS
Purchased transportation	41,036
Depreciation and amortization	2,550
Salaries, benefits, insurance, and other	10,530
Operating expenses and costs	54,116
OPERATING INCOME (LOSS)
Operating income (loss)	(864)
Truck Brokerage and Management
OPERATING REVENUES
Operating revenues	14,604	8,039
OPERATING EXPENSES AND COSTS
Operating expenses and costs	13,837	7,645
OPERATING INCOME (LOSS)
Operating income (loss)	767	394
Emergency and Preventative Maintenance
OPERATING REVENUES
Operating revenues	32,522	22,378
OPERATING EXPENSES AND COSTS
Operating expenses and costs	31,811	22,515
OPERATING INCOME (LOSS)
Operating income (loss)	711	(137)
Household Goods Moving Services
OPERATING REVENUES
Operating revenues	13,576	15,052
OPERATING EXPENSES AND COSTS
Operating expenses and costs	13,807	15,844
OPERATING INCOME (LOSS)
Operating income (loss)	(231)	(792)
Other and eliminations
OPERATING REVENUES
Operating revenues	(548)	(1,115)
OPERATING EXPENSES AND COSTS
Operating expenses and costs	636	(521)
OPERATING INCOME (LOSS)
Operating income (loss)	$ (1,184)	$ (594)