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Schedule of Long-Lived Assets by Geographic Area (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 273,414 $ 329,038
UNITED STATES    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 198,424 206,334
Foreign    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets [1] $ 74,990 $ 122,704
[1] As of December 31, 2015 and 2014, long-lived assets attributable to Singapore were $39.9 million and $99.2 million, respectively.