Net Sales - Summary of Net Sales Disaggregated by Principal Markets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net sales:
Net sales	$ 109,217	$ 114,287	$ 387,494	$ 461,096
Chemical
Net sales:
Net sales	109,217	114,287	387,494	461,096
Chemical | AN and Nitric Acid
Net sales:
Net sales	47,981	46,026	154,858	173,859
Chemical | Urea ammonium nitrate (UAN)
Net sales:
Net sales	25,303	30,090	109,303	117,585
Chemical | Ammonia
Net sales:
Net sales	28,490	26,823	96,468	129,850
Chemical | Other
Net sales:
Net sales	$ 7,443	$ 11,348	$ 26,865	$ 39,802