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Business combinations, dispositions and related transactions - Additional Information (Details) $ in Millions |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 01, 2023 USD ($) | Sep. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2024 shares | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) item shares | Jul. 10, 2024 USD ($) | Dec. 31, 2021 shares
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Fixed asset impairment | $ |  |  |  |  | $ 3.8 |  |  |
Loss on sale of Basic Power Company (BPC) | $ | $ 2.6 |  |  |  |  |  |  |
Basic Management Inc |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Fixed asset impairment | $ |  |  | $ 16.4 |  |  |  |  |
Loss on deconsolidation of Basic Water Company ("BWC") | $ |  | $ 2.0 |  |  |  |  |  |
Bad debt expense recognized | $ |  | $ 1.3 |  |  |  |  |  |
Shares Repurchased from Affiliates |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Number of affiliates | item |  |  |  |  |  | 2 |  |
Number of private transactions | item |  |  |  |  |  | 2 |  |
Kronos |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Repurchase of common stock |  |  |  |  |  |  |  | 2,000,000
Shares available for purchase |  |  |  | 1,017,518 |  |  |  |
CompX International | Class A |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Common stock, Repurchased |  |  |  | 0 | 0 |  |  |
Shares available for purchase |  |  |  | 523,647 |  |  |  |
NL Industries |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Common stock, Repurchased |  |  |  |  |  | 2,000 |  |
Reorganization, Chapter 11, Debtor-in-Possession |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Cash | $ |  |  |  |  |  |  | $ 2.6 |
Treasury stock | Kronos |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Common stock, Repurchased |  |  |  | 0 | 313,814 | 217,778 |  |
Stock repurchase, aggregate purchase price | $ |  |  |  |  | $ 2.8 | $ 2.5 |  |
Treasury stock | CompX International | Shares Repurchased in Market Transaction |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Common stock, Repurchased |  |  |  |  |  | 70,000 |  |
Treasury stock | CompX International | Shares Repurchased from Affiliates |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Common stock, Repurchased |  |  |  |  |  | 8,900 |  |
Treasury stock | CompX International | Class A |  |  |  |  |  |  |  |
Business combinations, dispositions and related transactions |  |  |  |  |  |  |  |
Common stock, Repurchased |  |  |  |  |  | 78,900 |  |
Stock repurchase, aggregate purchase price | $ |  |  |  |  |  | $ 1.7 |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481372/852-10-55-10 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479168/946-830-55-12 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 45 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477796/946-210-45-21 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 20 -SubTopic 210 -Topic 946 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477796/946-210-45-20 + Details
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