Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Income Taxes [Line Items]
Deferred tax liabilities related to intangible assets	$ 26,061,000	$ 21,382,000
Increase to unrecognized tax position reserve relating to the prior year's state tax filings	900,000
Commercial foreign sourced income tax rate	11.60%
Undistributed earnings of foreign subsidiaries	13,400,000
Switzerland
Income Taxes [Line Items]
Deferred tax liabilities related to intangible assets	$ 17,700,000	$ 13,700,000