Goodwill and Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Oct. 31, 2013	Jan. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 11,558	$ 19,387
Accumulated Amortization	(6,010)	(10,547)
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,260	8,008
Accumulated Amortization	(3,101)	(3,798)
Weighted Average Amortization Period in Years	14 years	14 years
Customer/contract-related [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		3,340
Accumulated Amortization		(3,215)
Weighted Average Amortization Period in Years		1 year
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	905	3,012
Accumulated Amortization	(492)	(1,634)
Weighted Average Amortization Period in Years	15 years	15 years
Software and licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,747	2,747
Accumulated Amortization	(1,565)	(919)
Weighted Average Amortization Period in Years	3 years	3 years
Non-competition agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	680	680
Accumulated Amortization	(340)	(255)
Weighted Average Amortization Period in Years	6 years	6 years
Other intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	966	1,600
Accumulated Amortization	$ (512)	$ (726)
Weighted Average Amortization Period in Years	22 years	21 years