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Schedule of Tax Effects Allocated to Each Component of Other Comprehensive Loss (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Components Of Other Comprehensive Income Loss [Line Items]    
Foreign currency translation adjustment $ (9,214) $ (2,885)
Unrealized gain on available-for-sale securities 2 14
Income tax expense (1) (6)
Unrealized gain on available-for-sale securities, net of tax 1 8
Other comprehensive loss $ (9,213) $ (2,877)