For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479

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

Acquisitions of and Investments in Businesses and Technologies (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2012 Ranchview [Member]	Apr. 30, 2012 Ranchview [Member]	Nov. 30, 2009 Ranchview [Member]
Business Acquisition [Line Items]
Contingent consideration, potential cash payment					$ 4,000
Contingent consideration, cash paid to settle				1,841
Gain on acquisition-related contingent liability settlement	$ 0	$ (508)	$ 508