Acquisitions (Detail) - Aggregate Preliminary Purchase Price Allocation to Assets Acquired and Liabilities Assumed in Acquisition (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Assets:
Cash	$ 8,502
Fees receivable	1,310
Prepaid expenses and other current assets	560
Goodwill and amortizable intangible assets (1)	15,990	[1]
Total assets	26,362
Liabilities:
Accounts payable and accrued liabilities	2,203
Deferred revenues (2)	5,321	[2]
Total liabilities	$ 7,524

[1] Includes $7.5 million allocated to goodwill and $8.5 million allocated to amortizable intangible assets (see Note 1-Business and Significant Accounting Policies above for additional information).

[2] The fair value of the cost to fulfill the deferred revenue obligations was determined by estimating the costs to provide the services plus a normal profit margin, and did not include costs associated with selling efforts.