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Significant Accounting Policies - Additional Information (Detail) | 2 Months Ended | 3 Months Ended | 12 Months Ended |
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May 21, 2018 $ / shares shares | Mar. 31, 2016 USD ($) | Sep. 30, 2015 USD ($) | Mar. 31, 2018 USD ($) $ / shares shares | Mar. 31, 2017 USD ($) Customer $ / shares shares | Mar. 31, 2016 USD ($) $ / shares shares | Aug. 10, 2015 shares
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Allowance for doubtful accounts |  |  |  | $ 8,600,000 | $ 10,700,000 |  |
Bad debt expense |  |  |  | 800,000 |  |  |
Uncollectible accounts, wrote-off |  |  |  | 2,900,000 |  |  |
Notes receivable, total |  |  |  | 2,300,000 |  |  |
Notes receivable, current |  |  |  | $ 2,200,000 |  |  |
Notes receivable interest rate |  |  |  | 3.50% |  |  |
Notes Receivable basis spread on Prime rate |  |  |  | 5.10% |  |  |
Notes receivable, maturity description |  |  |  | Remaining unpaid amounts, plus accrued interest, mature in fiscal 2019 and 2021. |  |  |
Inventories wrote down |  |  |  |  | 8,492,000 | $ 9,382,000 |
Depreciable assets |  |  |  | $ 109,600,000 | 86,000,000 | 84,200,000 |
Basis of valuation |  |  |  | Property, plant, and equipment are stated at cost. |  |  |
Depreciation method |  |  |  | straight-line basis over the estimated useful lives |  |  |
Impairment of Intangible Assets |  | $ 6,600,000 | $ 28,400,000 |  |  | 34,999,000 |
Impairment of long-lived and intangible assets |  |  |  | $ 0 | 0 |  |
Reduction of prepaid sand liability |  |  |  |  | 2,000,000 | 10,658,000 |
Intangible Assets, Amortization Expense |  |  |  | 4,400,000 | $ 4,800,000 | $ 12,900,000 |
Amortization expense, expected, for fiscal year 2019 |  |  |  | 3,200,000 |  |  |
Amortization expense, expected, for fiscal year 2020 |  |  |  | 2,200,000 |  |  |
Amortization expense, expected, for fiscal year 2021 |  |  |  | 1,700,000 |  |  |
Amortization expense, expected, for fiscal year 2022 |  |  |  | 1,700,000 |  |  |
Amortization expense, expected, for fiscal year 2023 |  |  |  | $ 1,700,000 |  |  |
Number of additional shares authorized to be repurchased | shares |  |  |  |  |  |  | 6,782,700
Outstanding authorization shares | shares |  |  |  |  |  |  | 7,500,000
Repurchase of shares | shares |  |  |  | 627,772 | 788,800 | 1,894,000 |
Shares repurchased average price | $ / shares |  |  |  | $ 97.30 | $ 76.08 | $ 65.24 |
Freight costs included in revenue and cost of goods sold |  |  |  | $ 158,300,000 | $ 138,000,000 | $ 139,500,000 |
Accumulated other comprehensive loss |  |  |  | 4,012,000 | 7,396,000 |  |
Net of income taxes for accumulated other comprehensive loss |  |  |  | 1,300,000 |  |  |
Interest payments |  |  |  | 28,900,000 | 19,000,000 | 16,900,000 |
Net payments made for federal and state income taxes |  |  |  | 69,400,000 | 76,100,000 | 63,900,000 |
Maintenance and repair expenses |  |  |  | $ 107,300,000 | $ 101,500,000 | $ 95,100,000 |
Stock options excluded from computation of diluted earnings per share | shares |  |  |  | 98,362 | 513,262 | 688,420 |
Stock options, average exercise price per share | $ / shares |  |  |  | $ 98.75 | $ 80.59 | $ 80.51 |
Increase in gross profit |  |  |  | $ 800,000 |  |  |
Decrease in other income |  |  |  | (800,000) |  |  |
ASU 2016-09 [Member] |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Cumulative effect reduction in retained earnings |  |  |  | 700,000 |  |  |
Impact to retained earnings |  |  |  | 0 |  |  |
Recognition of excess tax benefits in provision for income taxes |  |  |  | 4,100,000 |  |  |
ASU 2018-02 [Member] |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Reclassification of income tax effect from accumulated other comprehensive loss to retained earnings |  |  |  | $ 1,000,000 |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Repurchase of shares | shares | 319,300 |  |  |  |  |  |
Shares repurchased average price | $ / shares | $ 101.39 |  |  |  |  |  |
Stock repurchase remaining number of shares authorized to be repurchased | shares | 3,870,128 |  |  |  |  |  |
Sand [Member] |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Customer advances |  | $ 2,000,000 |  |  |  | $ 2,000,000 |
Date of contract termination |  |  |  | Jun. 30, 2016 |  |  |
Customer Contracts And Relationships [Member] |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Intangible Assets, Net |  |  |  | $ 13,528,000 | $ 15,957,000 |  |
Oil and Gas Proppants [Member] |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Reduction of prepaid sand liability |  |  |  | 2,000,000 |  |  |
Number of customers terminated contract | Customer |  |  |  |  | 2 |  |
Settlement agreements, amount received |  |  |  |  | $ 12,900,000 |  |
Oil and Gas Proppants [Member] | Customer Contracts And Relationships [Member] |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Intangible Assets, Net |  |  |  | $ 1,600,000 |  |  |
Intangible assets, wrote-off due to termination of contract |  |  |  |  | 1,300,000 |  |
Oil and Gas Proppants [Member] | Raw Materials [Member] |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Inventories wrote down |  |  |  |  | 7,700,000 |  |
Oil and Gas Proppants [Member] | Materials-in-Process and Frac Sand [Member] |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Inventories wrote down |  |  |  |  | $ 800,000 |  |

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- Definition Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66092785&loc=d3e4542-108314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 1C -URI http://asc.fasb.org/extlink&oid=68049868&loc=SL66093883-108312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=68049868&loc=SL66093879-108312 + Details
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- Definition The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin. + References No definition available. + Details
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- Definition Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 + Details
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- Definition Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements. + References No definition available. + Details
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- Definition Amount of the effect of a change in accounting principle on net income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 + Details
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- Definition Amount of the effect of a change in accounting principle on operating profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 + Details
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- Definition An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4531-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 + Details
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- Definition Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569643-111683 + Details
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- Definition Cash received for the settlement of litigation during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Describes the basis at which an entity records its property, plant and equipment (for example at cost, fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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