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Summary of Business Sales by Product and Geographic Location (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net sales
Net sales	$ 113,104	$ 107,046	$ 212,780	$ 211,154
Change in net sales	$ 6,058		$ 1,626
Percentage change in net sales	6.00%		1.00%
Gross profit:
Total gross profit	$ 41,653	43,297	$ 83,355	84,348
Change in gross profit	$ (1,644)		$ (993)
Percentage change in gross profit	(4.00%)		(1.00%)
Crop
Net sales
Net sales	$ 95,885		$ 183,273
US
Net sales
Net sales	64,530	64,363	126,067	134,178
Change in net sales	$ 167		$ (8,111)
Percentage change in net sales	0.00%		(6.00%)
Gross profit:
Total gross profit	$ 27,277	32,574	$ 57,086	63,185
Change in gross profit	$ (5,297)		$ (6,099)
Percentage change in gross profit	(16.00%)		(10.00%)
US | Crop
Net sales
Net sales	$ 47,311	51,760	$ 96,560	108,785
Change in net sales	$ (4,449)		$ (12,225)
Percentage change in net sales	(9.00%)		(11.00%)
Gross profit:
Total gross profit	$ 18,719	26,222	$ 42,214	50,753
Change in gross profit	$ (7,503)		$ (8,539)
Percentage change in gross profit	(29.00%)		(17.00%)
US | Non Crop
Net sales
Net sales	$ 17,219	12,603	$ 29,507	25,393
Change in net sales	$ 4,616		$ 4,114
Percentage change in net sales	37.00%		16.00%
Gross profit:
Total gross profit	$ 8,558	6,352	$ 14,872	12,432
Change in gross profit	$ 2,206		$ 2,440
Percentage change in gross profit	35.00%		20.00%
International
Net sales
Net sales	$ 48,574	42,683	$ 86,713	76,976
Change in net sales	$ 5,891		$ 9,737
Percentage change in net sales	14.00%		13.00%
Gross profit:
Total gross profit	$ 14,376	$ 10,723	$ 26,269	$ 21,163
Change in gross profit	$ 3,653		$ 5,106
Percentage change in gross profit	34.00%		24.00%

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