Quarterly report pursuant to Section 13 or 15(d)

The Company and Basis of Presentation - Additional Information (Detail)

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The Company and Basis of Presentation - Additional Information (Detail)
9 Months Ended
Sep. 30, 2014
Summary Of Significant Accounting Policies [Line Items]  
Majority-owned subsidiaries that Company controls Between 20% and 50%
Subsidiaries that Company accounts for under cost method Less than 20%