Business and Basis of Presentation (Detail) - Preliminary Allocation of Purchase Price) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Assets:
Goodwill	$ 593,212		$ 519,203	[1]
Software Advice, Inc.
Assets:
Cash	1,450
Fees receivable and other current assets	3,606
Property, equipment, and leasehold improvements	235
Amortizable intangible assets	26,928	[2]
Goodwill	73,663	[3],[4]
Total assets	105,882
Liabilities:
Accounts payable and accrued liabilities	2,657
Total liabilities	2,657
Net assets acquired	103,225	[5]
Other Acquisitions
Assets:
Cash	3,203	[6]
Fees receivable and other current assets	3,547	[6]
Property, equipment, and leasehold improvements	169	[6]
Amortizable intangible assets	5,047	[2],[6]
Goodwill	4,929	[3],[4],[6]
Total assets	16,895	[6]
Liabilities:
Accounts payable and accrued liabilities	4,554	[6]
Total liabilities	4,554	[6]
Net assets acquired	12,341	[5],[6]
Total
Assets:
Cash	4,653
Fees receivable and other current assets	7,153
Property, equipment, and leasehold improvements	404
Amortizable intangible assets	31,975	[2]
Goodwill	78,592	[3],[4]
Total assets	122,777
Liabilities:
Accounts payable and accrued liabilities	7,211
Total liabilities	7,211
Net assets acquired	$ 115,566	[5]

[1] The Company does not have any accumulated goodwill impairment losses.

[2] See Note 6 - Goodwill and Intangible Assets for additional information regarding the types and amounts of amortizable intangibles recorded from the 2014 Acquisitions.

[3] During the second quarter of 2014, the recorded amount of an amortizable intangible asset resulting from the Software Advice acquisition was reduced by $2.7 million and goodwill was increased by the same amount. This measurement period adjustment was based on a change in the underlying assumptions used to value the amortizable intangible asset and was due to the consideration of new information.

[4] During the third quarter of 2014 certain tax, working capital and other minor adjustments were recorded which decreased the recorded goodwill resulting from the Market-Visio acquisition by approximately $0.1 million on a net basis.

[5] The Company paid $112.2 million in cash on a gross basis for the net assets acquired through September 30, 2014. On a net basis, and for cash flow reporting, the Company paid $107.5 million through September 30, which represents the $112.2 million in cash paid on a gross basis minus the $4.7 million of cash acquired from the purchased companies. The Company has also recorded a liability for an additional $3.4 million to be paid for the 2014 Acquisitions, of which $2.5 million was paid in late October 2014.

[6] Includes the SircleIT Inc. and Market-Visio acquisitions.