Net Sales - Summary of Net Sales Disaggregated by Principal Markets (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Net sales:
Net sales	$ 151,296	$ 140,073	$ 294,728	$ 278,277
Chemical
Net sales:
Net sales	151,296	140,073	294,728	278,277
Chemical | AN and Nitric Acid
Net sales:
Net sales	61,707	58,442	119,325	106,877
Chemical | Urea ammonium nitrate (UAN)
Net sales:
Net sales	52,262	42,808	96,127	84,000
Chemical | Ammonia
Net sales:
Net sales	26,830	28,448	60,102	67,978
Chemical | Other
Net sales:
Net sales	$ 10,497	$ 10,375	$ 19,174	$ 19,422