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Summary of Business Sales by Product and Geographic Location (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net sales
Net sales	$ 99,676	$ 104,108
Change in net sales	$ (4,432)
Percentage change in net sales	(4.00%)
Gross profit:
Total gross profit	$ 41,702	41,051
Change in gross profit	$ 651
Percentage change in gross profit	(1.00%)
Crop
Net sales
Net sales	$ 87,388
US
Net sales
Net sales	61,537	69,236
Change in net sales	$ (7,699)
Percentage change in net sales	(11.00%)
Gross profit:
Total gross profit	$ 29,668	30,872
Change in gross profit	$ (1,204)
Percentage change in gross profit	(6.00%)
US | Crop
Net sales
Net sales	$ 50,270	57,344
Change in net sales	$ (7,074)
Percentage change in net sales	(12.00%)
Gross profit:
Total gross profit	$ 23,822	25,060
Change in gross profit	$ (1,238)
Percentage change in gross profit	(4.00%)
US | Non Crop
Net sales
Net sales	$ 11,267	11,892
Change in net sales	$ (625)
Percentage change in net sales	(5.00%)
Gross profit:
Total gross profit	$ 5,846	5,812
Change in gross profit	$ 34
Percentage change in gross profit	(16.00%)
International
Net sales
Net sales	$ 38,139	34,872
Change in net sales	$ 3,267
Percentage change in net sales	9.00%
Gross profit:
Total gross profit	$ 12,034	$ 10,179
Change in gross profit	$ 1,855
Percentage change in gross profit	17.00%

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