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Summary of Fair Value of Assets Acquired and Liabilities Assumed in Conjunction with Acquisition (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Mar. 08, 2013
Business Acquisition [Line Items]    
Goodwill $ 637,135 $ 637,135
Intangible assets with indefinite lives 220,416  
Intangible assets with definite lives 136,697 [1]  
Net assets 15,078 [2]  
Deferred tax liabilities (111,508)  
Redeemable noncontrolling interest (343,984)  
Total $ 553,834  
[1] Acquired definite-lived intangible assets primarily consist of technology, partner relationship and non-compete agreement assets and have estimated useful lives of between 3 and 7 years with a weighted average life of 3.7 years.
[2] Includes cash acquired of $13 million.