Summary of Significant Accounting Policies - Schedule of Intangible Assets (Detail)	12 Months Ended
	Jan. 31, 2015
Customer Contracts [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets with finite useful lives	6 years
Completed Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets with finite useful lives	5 years 2 months 12 days
Trademarks, Patents and Other [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets with finite useful lives	5 years
Minimum [Member] | Customer Contracts [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets with finite useful lives	1 year
Minimum [Member] | Non-Compete Agreements [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets with finite useful lives	2 years
Minimum [Member] | Completed Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets with finite useful lives	4 years
Maximum [Member] | Customer Contracts [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets with finite useful lives	8 years
Maximum [Member] | Non-Compete Agreements [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets with finite useful lives	3 years
Maximum [Member] | Completed Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets with finite useful lives	6 years