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Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Balance - Beginning of the year $ 894 $ 811 $ 1,098
Gross increase - tax positions in prior periods 70 66 70
Gross decreases - tax positions in prior periods (39) (14) (219)
Gross increases - current period tax positions 0 59 65
Lapse of statute of limitations (12) (12) (221)
Currency translation adjustment (5) (16)  
Currency translation adjustment     18
Balance - End of the year $ 908 $ 894 $ 811