OPERATING SEGMENT DATA (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
OPERATING REVENUES
Operating revenues	$ 510,543	$ 498,550	$ 951,410	$ 933,481
OPERATING EXPENSES AND COSTS
Depreciation and amortization			39,970	35,971
Gain on sale of property and equipment			(516)	(873)
Operating expenses and costs	503,342	489,552	967,196	946,475
OPERATING INCOME (LOSS)
Operating income (loss)	7,201	8,998	(15,786)	(12,994)
OTHER INCOME (EXPENSE)
Interest and dividend income	215	273	469	516
Interest expense and other related financing costs	(1,112)	(932)	(2,255)	(1,927)
Other, net	(220)	281	1,120	2,892
Other income (expense), net	(1,117)	(378)	(666)	1,481
INCOME (LOSS) BEFORE INCOME TAXES	6,084	8,620	(16,452)	(11,513)
Assets
ASSETS	1,067,031		1,067,031		916,220
Freight Transportation
OPERATING REVENUES
Operating revenues	445,740	452,126	846,295	849,398
OPERATING EXPENSES AND COSTS
Salaries, wages and benefits	269,488	273,065	535,005	535,365
Fuel, supplies and expenses	82,893	88,010	163,658	167,127
Operating taxes and licenses	10,823	11,572	21,623	22,993
Insurance	5,587	6,511	10,471	12,991
Communications and utilities	3,464	3,723	7,268	7,697
Depreciation and amortization	19,477	17,341	38,058	34,542
Rents and purchased transportation	44,285	43,170	81,043	81,525
Gain on sale of property and equipment	(231)	(784)	(513)	(883)
Other	2,277	1,920	3,982	3,501
Operating expenses and costs	438,063	444,528	860,595	864,858
OPERATING INCOME (LOSS)
Operating income (loss)	7,677	7,598	(14,300)	(15,460)
Assets
ASSETS	611,316		611,316		600,239
Premium Logistics and Expedited Freight Services
OPERATING REVENUES
Operating revenues	10,835		10,835
OPERATING EXPENSES AND COSTS
Purchased transportation	8,247		8,247
Depreciation and amortization	473		473
Other	1,635		1,635
Operating expenses and costs	10,355		10,355
OPERATING INCOME (LOSS)
Operating income (loss)	480		480
Assets
ASSETS	232,323		232,323
Truck Brokerage and Management
OPERATING REVENUES
Operating revenues	10,021	6,411	18,060	11,511
OPERATING EXPENSES AND COSTS
Operating expenses and costs	9,366	5,843	17,011	10,558
OPERATING INCOME (LOSS)
Operating income (loss)	655	568	1,049	953
Assets
ASSETS	8,154		8,154		6,225
Emergency and Preventative Maintenance
OPERATING REVENUES
Operating revenues	30,101	23,341	52,479	45,618
OPERATING EXPENSES AND COSTS
Operating expenses and costs	29,407	22,424	51,921	43,779
OPERATING INCOME (LOSS)
Operating income (loss)	694	917	558	1,839
Assets
ASSETS	17,721		17,721		13,634
Household Goods Moving Services
OPERATING REVENUES
Operating revenues	20,479	25,241	35,531	41,112
OPERATING EXPENSES AND COSTS
Operating expenses and costs	20,314	24,293	36,157	40,028
OPERATING INCOME (LOSS)
Operating income (loss)	165	948	(626)	1,084
Assets
ASSETS	25,416		25,416		20,687
Other and eliminations
OPERATING REVENUES
Operating revenues	(6,633)	(8,569)	(11,790)	(14,158)
OPERATING EXPENSES AND COSTS
Operating expenses and costs	(4,163)	(7,536)	(8,843)	(12,748)
OPERATING INCOME (LOSS)
Operating income (loss)	(2,470)	(1,033)	(2,947)	(1,410)
Assets
ASSETS	$ 172,101		$ 172,101		$ 275,435