XML 88 R58.htm IDEA: XBRL DOCUMENT v2.4.0.6
Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Land $ 9,855  
Building and improvements 72 72
Leasehold improvements 4,621 2,515
Computer equipment and software 65,515 59,292
Furniture and equipment 9,001 8,534
Transportation equipment 162,461 136,691
Construction in process 6,142 1,101
Property and Equipment, gross 257,667 208,205
Less: Accumulated depreciation and amortization (100,083) (83,618)
Property and Equipment, net $ 157,584 $ 124,587