Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment, Net (Details)

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Property and Equipment, Net (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Summary of property and equipment    
Property and equipment, gross $ 74,706 $ 68,673
Less accumulated depreciation and amortization (41,834) (34,046)
Property and equipment, net 32,872 34,627
Land [Member]
    
Summary of property and equipment    
Property and equipment, gross 630 630
Building [Member]
    
Summary of property and equipment    
Property and equipment, gross 10,680 10,680
Machinery and equipment [Member]
    
Summary of property and equipment    
Property and equipment, gross 13,946 13,429
Computer software (purchased and developed) and equipment [Member]
    
Summary of property and equipment    
Property and equipment, gross 41,954 37,880
Vehicles [Member]
    
Summary of property and equipment    
Property and equipment, gross 249 221
Leasehold improvements [Member]
    
Summary of property and equipment    
Property and equipment, gross 2,428 2,122
Furniture and fixtures [Member]
    
Summary of property and equipment    
Property and equipment, gross 1,359 1,244
Construction in process [Member]
    
Summary of property and equipment    
Property and equipment, gross $ 3,460 $ 2,467