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Trade and Other Receivables - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Jan. 01, 2018
Dec. 31, 2016
Disclosure of financial assets [Line Items]      
Trade receivables that were impaired $ 112,403 $ 112,419 $ 79,472
Other receivables that were impaired 9,509   16,918
Fair values of collateral 1,181   842
Impairment loss 191    
Financial assets impaired [Member]      
Disclosure of financial assets [Line Items]      
Trade receivables that were impaired 3,472   3,342
Other receivables that were impaired $ 28   $ 189