Fair Value Measurements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Apr. 30, 2012	Apr. 30, 2012 Verint [Member] Term Loan Facility [Member] Fair Value, Measurements, Nonrecurring [Member] Carrying Amount [Member]	Jan. 31, 2012 Verint [Member] Term Loan Facility [Member] Fair Value, Measurements, Nonrecurring [Member] Carrying Amount [Member]	Apr. 30, 2012 Verint [Member] Term Loan Facility [Member] Fair Value, Measurements, Nonrecurring [Member] Estimated Fair Value [Member]	Jan. 31, 2012 Verint [Member] Term Loan Facility [Member] Fair Value, Measurements, Nonrecurring [Member] Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Minimum discount rate for fair value of contingent consideration (percent)	4.10%
Maximum discount rate for fair value of contingent consideration (percent)	17.50%
Carrying amount of term loan		$ 592.9	$ 594.3	$ 597.0	$ 597.0

This element represents the portion of the balance sheet assertion valued at fair value by the entity 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. Fair value of Loans Payable at the balance sheet date.

No definition available.

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