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Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2019
Fair Value Disclosures [Abstract] |
Summary of Financial Instruments Not Carried at Fair Value | The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure as of December 31, 2018 and 2019:
| December 31, 2018 |  |  | December 31, 2019 |
| Carrying amount |  |  | Fair value |  |  | Carrying amount |  |  | Fair value |
| (In thousands) |
Cash, cash equivalents and restricted cash | $ | 120,989 |  |  | $ | 120,989 |  |  | $ | 157,870 |  |  | $ | 157,870 |
Noncontrolling interest in CompX common stock |  | 19,443 |  |  |  | 22,871 |  |  |  | 22,707 |  |  |  | 24,627 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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