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Supplemental Cash Flow Information (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Supplemental disclosure of cash flow information:    
Cash paid for interest $ 5,614 $ 1,704
Cash paid for taxes 2,763 8,753
Non-cash investing activities:    
Translation gain (loss) adjustment $ (2,109) $ 5,288