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Commitments and Contingencies - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2016 USD ($) Cases site Plaintiff | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Net Payments, net | $ 1,627,000 | $ 1,252,000 | $ 10,106,000 |
Payments |  |  | 2,900,000 |
Aggregate amount of payments | $ 6,000,000 |  |  |
Payment for environmental liabilities |  |  | 2,900,000 | $ 3,000,000
Discount rate | 3.00% |  |  |
Prepayments during 2014 |  |  | 1,900,000 |
Accrual for reasonably estimable environmental remediation and related matters | $ 116,658,000 | $ 113,133,000 | $ 110,015,000 | $ 113,636,000
Customer Concentration Risk | Top Ten Customers | Sales Revenue |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Concentration risk percentage | 46.00% | 48.00% | 47.00% |
Component Products | Customer Concentration Risk | Customer Two | Sales Revenue | CompX Security Products Business |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Concentration risk percentage | 11.00% | 12.00% | 12.00% |
Component Products | Customer Concentration Risk | Customer One | Sales Revenue | CompX Security Products Business |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Concentration risk percentage | 14.00% | 13.00% | 13.00% |
Environmental Remediation Sites NL Named As PRP Or Defendant |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Accrual for reasonably estimable environmental remediation and related matters | $ 117,000,000 |  |  |
Number of sites associated with remediation and related costs | site | 41 |  |  |
Number of sites currently not able to reasonably estimate a range of costs | site | 5 |  |  |
Maximum | Environmental Remediation Sites NL Named As PRP Or Defendant |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Upper end range, estimate costs for remediation and related matters | $ 160,000,000 |  |  |
Environmental Remediation Litigation |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Recoveries receivable | $ 0 | $ 0 |  |
Lead Pigment Litigation |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Number of cases settled and dismissed and found not liable | Cases | 100 |  |  |
Period by which loss contingency claims settled and dismissed | 20 years |  |  |
California Lead Paint Litigation |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Amount awarded to the plaintiff | $ 1,150,000,000 |  |  |
Product Liability And Occupational Exposure Litigation Claims |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Number of cases pending | Cases | 103 |  |  |
Product Liability And Occupational Exposure Litigation Claims | Administratively Dismissed Claims |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Number of plaintiffs involved | Plaintiff | 8,687 |  |  |
Product Liability And Occupational Exposure Litigation Claims | Pending Claims |  |  |  |
Commitments and Contingent Liabilities [Line Items] |  |  |  |
Number of plaintiffs involved | Plaintiff | 588 |  |  |

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