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Supplemental Cash Flow Disclosures - Cash Paid for Interest and Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Supplemental Cash Flow Elements [Abstract]      
Interest $ 7,986 $ 9,268 $ 10,783
Income taxes $ 23,558 $ 18,277 $ 67,941