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Summary of International Sales (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues From External Customers
Net sales	$ 130,521	$ 124,884	$ 113,104	$ 99,676	$ 131,338	$ 111,780	$ 107,046	$ 104,108	$ 468,186	$ 454,272	$ 355,047
South and Central America
Revenues From External Customers
Net sales									111,106	86,172	25,748
Mexico
Revenues From External Customers
Net sales									28,835	24,578	16,030
Asia
Revenues From External Customers
Net sales									15,554	14,828	28,880
Canada
Revenues From External Customers
Net sales									11,637	3,403	4,083
Europe
Revenues From External Customers
Net sales									6,889	11,059	10,700
Africa
Revenues From External Customers
Net sales									6,750	8,027	7,893
Australia
Revenues From External Customers
Net sales									2,798	2,635	4,334
Middle East
Revenues From External Customers
Net sales									2,392	3,256	1,237
International
Revenues From External Customers
Net sales									$ 185,961	$ 153,958	$ 98,905

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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