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Accumulated Other Comprehensive Loss - Components of Changes in Accumulated Other Comprehensive Loss (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2020
USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]  
Beginning Balance $ 327,631
Other comprehensive income 2,048
Ending Balance 354,896
Currency Translation Adjustments [Member]  
Accumulated Other Comprehensive Income Loss [Line Items]  
Beginning Balance (3,039)
Other comprehensive income 2,048
Ending Balance (991)
Accumulated Other Comprehensive Loss [Member]  
Accumulated Other Comprehensive Income Loss [Line Items]  
Beginning Balance (3,039)
Other comprehensive income 2,048
Ending Balance $ (991)