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Quarterly Results (unaudited) - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Effect Of Fourth Quarter Events [Line Items]
Pre-tax impairment loss			$ 220,265,000	$ 0	$ 0
Pre-tax expense related to settlement agreement			$ 1,800,000	$ 45,098,000
Personnel related expenses		$ 4,000,000
Homebuilder Settlement Agreement [Member]
Effect Of Fourth Quarter Events [Line Items]
Pre-tax expense related to settlement agreement		$ 6,000,000
Oil and Gas Proppants [Member]
Effect Of Fourth Quarter Events [Line Items]
Pre-tax impairment loss	$ 220,300,000

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
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- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

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