Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Oct. 31, 2013
Jan. 31, 2013
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total intangible assets, Gross $ 48,419 $ 48,711
Finite-lived intangible assets, Gross 48,219 48,511
Accumulated Amortization (34,284) (31,197)
Finite-lived intangible assets, Net 13,935 17,314
Total intangible assets, net 14,135 17,514
Indefinite-lived intangible assets 200 200
Indefinite-lived intangible assets 200 200
Customer Contracts [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted average remaining life (years) 6 years 1 month 6 days  
Finite-lived intangible assets, Gross 32,749 32,568
Accumulated Amortization (21,611) (18,756)
Finite-lived intangible assets, Net 11,138 13,812
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 2,796 2,769
Accumulated Amortization (2,621) (2,375)
Finite-lived intangible assets, Net 175 394
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 11,543 11,448
Accumulated Amortization (8,938) (8,437)
Finite-lived intangible assets, Net 2,605 3,011
Trademarks and Other [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Weighted average remaining life (years) 1 month 6 days  
Finite-lived intangible assets, Gross 1,131 1,726
Accumulated Amortization (1,114) (1,629)
Finite-lived intangible assets, Net 17 97
Trade Names [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Indefinite-lived intangible assets 200 200
Indefinite-lived intangible assets $ 200 $ 200