FAIR VALUE MEASUREMENTS - OTHER FAIR VALUE DISCLOSURES (Details) (Level 3, Estimated fair value, Term loan, USD $) In Millions, unless otherwise specified	Jul. 31, 2013	Jan. 31, 2013
Level 3 \| Estimated fair value \| Term loan
Other Financial Instruments
Long-term debt	$ 652.0	$ 583.0

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

No definition available.

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