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Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance $ (34,221) $ (43,530)  
Cumulative-effect adjustment to retained earnings 301    
Ending balance (45,968) (34,221) $ (43,530)
Foreign Currency Translation Adjustment      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (33,499) (43,459) (47,204)
Current period other comprehensive income (loss) (13,105) 9,960 3,745
Ending balance (46,604) (33,499) (43,459)
Cash Flow Hedging Instruments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (421) 215 600
Current period other comprehensive income (loss) 1,151 (421) (579)
Reclassification adjustment (94) (215) 194
Ending balance 636 (421) 215
Equity Securities      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (301) (286) (300)
Cumulative-effect adjustment to retained earnings $ 301    
Current period other comprehensive income (loss)   (15) 14
Ending balance   $ (301) $ (286)