Revenue - Additional Information (Detail)	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Direct Sales [Member] \| Customer Concentration Risk [Member]
Disaggregation Of Revenue [Line Items]
Direct sales, percentage of net sales	18.20%	17.30%	20.00%	20.90%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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