Discontinued Operations and Other Dispositions - Summary of Operating Results from Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net Earnings (Loss) from Discontinued Operations	$ 5,278		$ (160,297)		$ (154,646)
Discontinued Operations, Disposed of by Sale \| Oil and Gas Proppants [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Revenue	1,045		46,781		82,987
Cost of Goods Sold	3,415		58,185		104,521
Gross Profit	(2,370)		(11,404)		(21,534)
Other Non-Operating Income	226		569		577
Gain on Sale of Discontinued Operations	9,230
Impairment Losses		$ (199,136)	(199,136)	$ (183,086)	(183,086)
Earnings (Loss) from Discontinued Operations	7,086		(209,971)		(204,043)
Income Tax (Expense) Benefit	(1,808)		49,674		49,397
Net Earnings (Loss) from Discontinued Operations	$ 5,278		$ (160,297)		$ (154,646)

Discontinued operations asset impairment charges.

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Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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