Goodwill and Other Intangible Assets (Changes in Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill at beginning of period	$ 129,342	$ 131,542	$ 131,193
Acquisitions	0	0	349
Reorganization			0
Disposals		(2,200)
Goodwill at end of period	129,342	129,342	131,542
Trade
Goodwill [Roll Forward]
Goodwill at beginning of period	119,867	122,067	127,781
Acquisitions	0	0	0
Reorganization			5,714
Disposals		(2,200)
Goodwill at end of period	119,867	119,867	122,067
Renewables
Goodwill [Roll Forward]
Goodwill at beginning of period	8,789	8,789	2,726
Acquisitions	0	0	349
Reorganization			(5,714)
Disposals		0
Goodwill at end of period	8,789	8,789	8,789
Plant Nutrient
Goodwill [Roll Forward]
Goodwill at beginning of period	686	686	686
Acquisitions	0	0	0
Reorganization			0
Disposals		0
Goodwill at end of period	$ 686	$ 686	$ 686