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Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	$ 2,386	$ (13,017)	$ (968)	$ (8,782)
Other comprehensive income (loss) before reclassifications	(9,117)	7,319	(5,935)	2,882
Amounts reclassified from accumulated other comprehensive income (loss)	30	(37)	202	165
Net current-period other comprehensive income (loss)	(9,087)	7,282	(5,733)	3,047
Ending Balance	(6,701)	(5,735)	(6,701)	(5,735)
Foreign Currency Translation
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	2,308	(12,997)	(1,388)	(8,582)
Other comprehensive income (loss) before reclassifications	(9,089)	6,961	(5,393)	2,546
Net current-period other comprehensive income (loss)	(9,089)	6,961	(5,393)	2,546
Ending Balance	(6,781)	(6,036)	(6,781)	(6,036)
Unrealized Gains and (Losses) on available- for-Sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	78	(20)	420	(200)
Other comprehensive income (loss) before reclassifications	(28)	358	(542)	336
Amounts reclassified from accumulated other comprehensive income (loss)	30	(37)	202	165
Net current-period other comprehensive income (loss)	2	321	(340)	501
Ending Balance	$ 80	$ 301	$ 80	$ 301

X

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Section 45

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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