Commitments and Contingencies - Additional Information (Detail)	1 Months Ended				3 Months Ended	12 Months Ended
	Nov. 30, 2018 Cases	Sep. 30, 2018 USD ($)	May 31, 2018 USD ($) Installment	Jan. 31, 2014 USD ($)	Jun. 30, 2018 USD ($) Installment	Dec. 31, 2018 USD ($) Cases Installment site	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Commitments and Contingent Liabilities [Line Items]
Court approved abatement fund amount for defendant appeal		$ 409,000,000
Litigation settlement						$ 60,000,000
Litigation settlement net present value						17,000,000
Accrued insurance recoveries						266,000	$ 145,000
Number of complaints filed | Cases	2
Accrual for reasonably estimable environmental remediation and related matters						$ 98,211,000	$ 111,909,000	$ 116,658,000	$ 113,133,000
Customer Concentration Risk | Top Ten Customers | Sales Revenue
Commitments and Contingent Liabilities [Line Items]
Concentration risk percentage						44.00%	44.00%	46.00%
Component Products | Customer Concentration Risk | Customer Two | Sales Revenue | CompX Security Products Business
Commitments and Contingent Liabilities [Line Items]
Concentration risk percentage						13.00%	16.00%	14.00%
Component Products | Customer Concentration Risk | Customer One | Sales Revenue | CompX Security Products Business
Commitments and Contingent Liabilities [Line Items]
Concentration risk percentage								11.00%
Environmental Remediation Sites NL Named As PRP Or Defendant
Commitments and Contingent Liabilities [Line Items]
Accrual for reasonably estimable environmental remediation and related matters						$ 98,000,000
Number of sites associated with remediation and related costs | site						35
Number of sites currently not able to reasonably estimate a range of costs | site						5
Environmental Remediation Litigation
Commitments and Contingent Liabilities [Line Items]
Recoveries receivable						$ 15,000,000	$ 0
Maximum
Commitments and Contingent Liabilities [Line Items]
Proposed abatement fund amount by defendant						409,000,000
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						$ 117,000,000
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
Description of defendants						We and the other two defendants are jointly and severally liable for the abatement, which means we or either of the two other defendants could ultimately be responsible for payment of the full amount of the abatement fund. However, we do not believe any individual defendant would be 100% responsible for the cost of any abatement, and the allocation of the recalculated amount of the abatement fund ($409 million) among the three defendants has not yet been determined.
Percentage of defendants responsible for cost of abatement						100.00%
Litigation settlement			$ 65,000,000		$ 62,000,000
Litigation settlement charge upon approval of settlement terms			45,000,000		45,000,000	$ 45,000,000
Remaining litigation settlement charge			$ 20,000,000		$ 20,000,000	$ 20,000,000
Number of annual installments | Installment			5		5	5
Litigation settlement installments payment beginning term from approval			4 years		4 years	4 years
Remaining litigation settlement charge due in first installment			$ 6,000,000
Remaining litigation settlement charge due in second installment			5,000,000
Remaining litigation settlement charge due in third installment			3,000,000
Remaining litigation settlement charge due in fourth installment			3,000,000
Remaining litigation settlement charge due in fifth installment			$ 3,000,000
Discounted rate for estimated present value of remaining litigation amount						3.00%
Litigation settlement net present value					$ 17,000,000	$ 17,000,000
Accrued insurance recoveries						15,000,000
Litigation settlement, current						80,000,000
California Lead Paint Litigation
Commitments and Contingent Liabilities [Line Items]
Amount awarded to the plaintiff				$ 1,150,000,000
Minimum required period of abatement funds unspent to return to defendants				4 years
Proposed abatement fund amount by plaintiff						$ 730,000,000
Percentage of assumed homeowners participation						100.00%
Percentage of actual likely homeowners participation rates						100.00%