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Summary of Business Sales by Product and Geographic Location (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net sales
Net sales	$ 124,884	$ 111,780	$ 337,664	$ 322,934
Change in net sales	$ 13,104		$ 14,730
Percentage change in net sales	12.00%		5.00%
Gross profit:
Total gross profit	$ 47,463	$ 45,300	$ 130,818	$ 129,648
Change in gross profit	$ 2,163		$ 1,170
Percentage change in gross profit	5.00%		1.00%
Gross margin total	38.00%	41.00%	39.00%	40.00%
Crop
Net sales
Net sales	$ 105,506	$ 95,354	$ 288,779	$ 281,115
US
Net sales
Net sales	73,988	71,711	200,055	205,889
Change in net sales	$ 2,277		$ (5,834)
Percentage change in net sales	3.00%		(3.00%)
Gross profit:
Total gross profit	$ 33,417	$ 35,097	$ 90,503	$ 98,282
Change in gross profit	$ (1,680)		$ (7,779)
Percentage change in gross profit	(5.00%)		(8.00%)
Gross margin total	45.00%	49.00%	45.00%	48.00%
US | Crop
Net sales
Net sales	$ 55,952	$ 55,285	$ 152,512	$ 166,397
Change in net sales	$ 667		$ (13,885)
Percentage change in net sales	1.00%		(8.00%)
Gross profit:
Total gross profit	$ 23,926	27,106	$ 66,140	78,439
Change in gross profit	$ (3,180)		$ (12,299)
Percentage change in gross profit	(12.00%)		(16.00%)
US | Non Crop
Net sales
Net sales	$ 18,036	16,426	$ 47,543	39,492
Change in net sales	$ 1,610		$ 8,051
Percentage change in net sales	10.00%		20.00%
Gross profit:
Total gross profit	$ 9,491	7,991	$ 24,363	19,843
Change in gross profit	$ 1,500		$ 4,520
Percentage change in gross profit	19.00%		23.00%
International
Net sales
Net sales	$ 50,896	40,069	$ 137,609	117,045
Change in net sales	$ 10,827		$ 20,564
Percentage change in net sales	27.00%		18.00%
Gross profit:
Total gross profit	$ 14,046	$ 10,203	$ 40,315	$ 31,366
Change in gross profit	$ 3,843		$ 8,949
Percentage change in gross profit	38.00%		29.00%
Gross margin total	28.00%	25.00%	29.00%	27.00%

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