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Significant Accounting Policies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018 | Mar. 06, 2020 | Apr. 18, 2019
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Allowance for doubtful accounts | $ 9,900 | $ 12,400 | $ 9,900 |  |  |
Notes receivable, total |  | 9,800 |  |  |  |
Notes receivable, current |  | $ 700 |  |  |  |
Notes receivable interest rate |  | 4.10% |  |  |  |
Notes receivable, maturity description |  | Remaining unpaid amounts, plus accrued interest, mature in fiscal 2025 and 2026. |  |  |  |
Depreciable assets |  | $ 109,500 | 118,200 | $ 109,600 |  |
Basis of valuation |  | Property, Plant, and Equipment are stated at cost. |  |  |  |
Depreciation method |  | straight-line basis over the estimated useful lives |  |  |  |
Goodwill impairment more likely than not a likelihood as greater percentage of fair value of reportable unit exceeds its carrying value |  | 50.00% |  |  |  |
Intangible Assets, Amortization Expense |  | $ 2,500 | 4,300 | $ 4,400 |  |
Amortization expense, expected, for fiscal year 2021 |  | 4,300 |  |  |  |
Amortization expense, expected, for fiscal year 2022 |  | 4,200 |  |  |  |
Amortization expense, expected, for fiscal year 2023 |  | 4,200 |  |  |  |
Amortization expense, expected, for fiscal year 2024 |  | 4,200 |  |  |  |
Amortization expense, expected, for fiscal year 2025 |  | 4,200 |  |  |  |
Net book value of long-lived assets | 208,400 |  | 208,400 |  |  |
Impairment loss |  | 216,777 | 211,264 |  |  |
Adjusted carrying value of impaired assets | 72,700 |  | $ 72,700 |  |  |
Liabilities related to capitalized operating leases and asset retirement obligation, net |  | $ 17,900 |  |  |  |
Number of additional shares authorized to be repurchased |  |  |  |  |  | 10,000,000
Outstanding authorization shares |  |  |  |  |  | 10,724,758
Repurchase of shares |  | 3,574,109 | 3,309,670 | 627,722 |  |
Shares repurchased average price |  | $ 87.82 | $ 82.18 | $ 97.30 |  |
Stock repurchase remaining number of shares authorized to be repurchased |  | 7,305,649 |  |  |  |
Cost of Goods Sold |  | $ 1,119,552 | $ 1,066,673 | $ 1,047,764 |  |
Accumulated other comprehensive loss | 3,316 | 3,560 | 3,316 |  |  |
Net of income taxes for accumulated other comprehensive loss |  | 1,100 |  |  |  |
Maintenance and repair expenses |  | $ 127,000 | $ 116,300 | $ 107,300 |  |
Stock options excluded from computation of diluted earnings per share |  | 475,082 | 461,575 | 98,362 |  |
Stock options, average exercise price per share |  | $ 95.46 | $ 90.32 | $ 98.75 |  |
Operating lease right-of-use asset |  | $ 30,530 |  |  | $ 3,858 |
Operating lease liabilities |  | 60,016 |  |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Operating lease right-of-use asset |  | 66,700 |  |  |  |
Operating lease liabilities |  | 71,100 |  |  |  |
Freight [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Cost of Goods Sold |  | $ 168,100 | $ 169,600 | $ 158,300 |  |
Minimum [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Long-term supply agreements maturity year |  | 2020 |  |  |  |
Revenue from contract with customer collection terms |  | 30 days |  |  |  |
Maximum [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Long-term supply agreements maturity year |  | 2025 |  |  |  |
Revenue from contract with customer collection terms |  | 65 days |  |  |  |
Operating Facilities [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Impairment loss |  | $ 164,449 | 151,910 |  |  |
Utica, Illinois, Facility [Member] | Operating Facilities [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Net book value of long-lived assets | 135,700 |  | 135,700 |  |  |
New Auburn, Wisconsin Facility [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Impairment loss |  |  | 174,100 |  |  |
Corpus Christi, Texas Facility [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Impairment loss |  |  | 37,200 |  |  |
Oil and Gas Proppants [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Impairment losses to property, plant, and equipment |  | $ 187,600 | $ 211,300 |  |  |
Goodwill, impairment loss | $ 6,800 |  |  |  |  |
Oil and Gas Proppants [Member] | Discount Rate [Member] | Discounted Cash Flow Model [Member] |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |
Estimated discount rate for goodwill impairment | 11.00% |  | 11.00% |  |  |

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