Income Taxes - Reconciliation of Beginning and Ending Balance of Total Amounts of Gross Unrecognized Tax Benefits, Excluding Interest (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Income Tax Disclosure [Abstract]
Balance of gross unrecognized tax benefits, beginning of period	$ 9,364	$ 6,464
Gross amounts of increases in unrecognized tax benefits as a result of tax positions taken in the current period	445	3,616
Decrease due to expiration of statute of limitation	(439)	(737)
Gross decrease in prior period positions	(3,379)
Effect of currency translation	44	21
Balance of gross unrecognized tax benefits, end of period	$ 6,035	$ 9,364