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Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Receivables [Abstract]    
Trade receivables $ 9,893 $ 7,160
Insurance recoveries receivable 2,714 1,560
Interest receivable 1,175 869
Other receivables 406 692
Less allowance for doubtful accounts (214) (61)
Total trade and other receivables $ 13,974 $ 10,220