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Other Income, Net - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Jun. 30, 2021 | Sep. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |  |  |  |  |
Dividends and interest income |  |  |  |  |  |  | $ 4,000 | $ 4,800 | $ 10,900
Gain on securities transaction recognized |  |  |  |  |  |  |  | (100) | 300
Insurance recoveries |  |  |  |  |  |  | 100 | 1,600 | 7,700
Pre-tax gain on sale of land | $ 10,400 | $ 5,600 |  |  |  |  | 16,000 | 500 | 4,400
Net proceeds | $ 15,000 | $ 8,400 |  |  |  |  | $ 23,400 |  | 4,600
Gain on sale of business |  |  |  |  |  |  |  | $ 4,900 | 3,000
Kronos Worldwide, Inc. |  |  |  |  |  |  |  |  |
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |  |  |  |  |
Gains on insurance settlement related to property damage claim |  |  |  | $ 1,500 | $ 2,600 |  |  |  |
NL |  |  |  |  |  |  |  |  |
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |  |  |  |  |
Insurance recoveries |  |  |  |  |  |  |  |  | $ 5,100
Pre-tax gain on sale of land |  |  |  |  |  | $ 4,400 |  |  |
Net proceeds |  |  |  |  |  | $ 4,600 |  |  |
NL | Insurance and Risk Management Business |  |  |  |  |  |  |  |  |
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from sale of business |  |  |  |  | 3,250 |  |  |  |
Gain on sale of business |  |  |  |  | $ 3,000 |  |  |  |
BMI |  |  |  |  |  |  |  |  |
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |  |  |  |  |
Pre-tax gain on sale of land |  |  | $ 4,000 |  |  |  |  |  |

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- Definition Amount of unrealized and realized gain (loss) on investment in debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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- Definition Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684 + Details
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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2443-110228 + Details
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