Aggregate Preliminary Purchase Price Allocation to Assets Acquired and Liabilities Assumed in Acquisition (Detail) (Ideas International Limited, USD $) In Thousands, unless otherwise specified	May 31, 2012
Ideas International Limited
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Cash	$ 8,502
Fees receivable	1,310
Prepaid expenses and other current assets	560
Goodwill and amortizable intangible assets	15,865	[1]
Total assets	26,237
Accounts payable and accrued liabilities	2,203
Deferred revenues	5,331
Total liabilities	$ 7,534

[1] Includes $7.5 million allocated to goodwill and $8.4 million allocated to amortizable intangible assets. See Note 6-Goodwill and Intangible Assets below for additional information.