Business Combinations - Additional Information (Detail) (USD $)	9 Months Ended		1 Months Ended
Aug. 31, 2012	Aug. 31, 2011	Dec. 07, 2010 Loyalty Lab	Apr. 10, 2012 LogLogic, Inc	Aug. 30, 2011 Nimbus Partners Limited	Aug. 31, 2012 Other Acquisition
Business Acquisition [Line Items]
Acquisitions, net of cash acquired	$ 132,209,000	$ 22,579,000		$ 131,600,000
Acquisition related expenses			400,000	700,000	1,000,000
Cash paid to acquire outstanding equity shares			23,486,000	136,629,000	42,000,000	600,000
Goodwill			$ 11,966,000	$ 73,189,000	$ 28,194,000	$ 800,000

Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 52

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 53

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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