Short-Term Borrowings (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2012	Jan. 31, 2012
Disclosure Short Term Borrowings [Abstract]
Collections of previously sold accounts receivable	$ 3,360	$ 9,373
Other borrowings	4,979	5,244
Short-term borrowings	$ 8,339	$ 14,617

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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

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Name:	us-gaap_ShortTermBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant