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Business Combinations (Details) $ / shares in Units, $ in Thousands, T in Millions |  | 6 Months Ended |
--- | --- | --- | ---
Sep. 18, 2020 USD ($) $ / shares | Jun. 30, 2021 USD ($) | Sep. 30, 2021 T
Business Acquisition [Line Items] |  |  |
Processing capacity | T |  |  | 7.1
Cash | $ 309 |  |
Accounts receivable | 75 |  |
Inventory | 2,459 |  |
Prepaid expenses and other current assets | 124 |  |
Property, plant and equipment | 60,310 |  |
Right-of-use assets | 9,603 |  |
Total assets acquired | 72,880 |  |
Accounts payable | 16 |  |
Business Combination, Liabilities Assumed, Accrued Expense and Other Liabilities | 2,008 |  |
Asset retirement obligations | 8,424 |  |
Operating lease liabilities | 9,603 |  |
Deferred income taxes | 11,149 |  |
Total liabilities assumed | 31,200 |  |
Estimated fair value of net assets acquired | 41,680 |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount | 39,600 |  |
Eagle Materials Holdings [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Base price consideration | $ 2,000 |  |
Business Acquisition, Volume Weighted Average Share Price | $ / shares | $ 1.33 |  |
Business Acquisition, Share Price | $ / shares | $ 1.37 |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ 2,060 |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Working Capital | 20 |  |
Total purchase consideration | $ 2,080 |  |
Shares issued | 1,504 |  |
Business Combination, Acquisition Related Costs |  | $ 891 |
Eagle Materials Holdings [Member] | BNSF [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Processing capacity | T |  |  | 1.6

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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