Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail)

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Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Oct. 31, 2014
Jan. 31, 2014
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, Gross $ 52,374 $ 53,977
Accumulated Amortization (43,451) (41,322)
Finite-lived intangible assets, Net 8,923 12,655
Total intangible assets, Gross 52,574 54,177
Accumulated Amortization (43,651) (41,322)
Total intangible assets, net 8,923 12,855
Customer Contracts [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted average remaining life (years) 6 years  
Finite-lived intangible assets, Gross 31,656 32,593
Accumulated Amortization (24,172) (22,344)
Finite-lived intangible assets, Net 7,484 10,249
Non-Compete Agreements [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted average remaining life (years) 3 months 18 days  
Finite-lived intangible assets, Gross 2,628 2,772
Accumulated Amortization (2,593) (2,632)
Finite-lived intangible assets, Net 35 140
Completed Technology [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted average remaining life (years) 5 years 1 month 6 days  
Finite-lived intangible assets, Gross 10,969 11,461
Accumulated Amortization (9,565) (9,195)
Finite-lived intangible assets, Net 1,404 2,266
Trademarks, Patents and Other [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted average remaining life (years) 0 years  
Finite-lived intangible assets, Gross 7,121 7,151
Accumulated Amortization (7,121) (7,151)
Trade Names [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Indefinite-lived intangible assets, Gross 200 200
Accumulated Amortization (200)  
Indefinite-lived intangible assets, Net   $ 200