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Schedule of Long-Lived Assets by Geographic Area - Additional Information (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 329,038us-gaap_NoncurrentAssets $ 275,236us-gaap_NoncurrentAssets
SINGAPORE    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 99,200us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_SG
$ 42,500us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_SG