XML 53 R59.htm IDEA: XBRL DOCUMENT v2.4.0.6
Property And Equipment (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Property, Plant and Equipment [Line Items]      
Equipment, capital lease obligation $ 26,400,000    
Equipment, capital lease obligation, net 25,300,000    
Transportation equipment 136,691,000 54,316,000  
Trailers related to acquisition of mode 7,100,000    
Depreciation expense 14,800,000 8,000,000 7,800,000
Amortization expense under capital lease obligation 1,100,000    
Containers [Member]
     
Property, Plant and Equipment [Line Items]      
Additions to transportation equipment 45,600,000    
Chassis [Member]
     
Property, Plant and Equipment [Line Items]      
Equipment, capital lease obligation $ 26,400,000