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Related Party Transactions - Additional Information (Detail) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2019
Related Party Transaction [Line Items] |  |  |  |  |
Note receivable from affiliate |  | $ 34,000,000 | $ 38,200,000 |  |
Contran Corporation | Intercorporate Services Agreements Fees |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related party transaction expense |  | 3,500,000 | 2,800,000 | $ 3,100,000 |
Tall Pines Insurance Company And EWI RE Inc |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related party transaction expense |  | 2,000,000 | 2,200,000 | 1,700,000 |
Unsecured Revolving Demand Promissory | Valhi Inc |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Maximum loan amount | $ 40,000,000 |  |  |  |
Interest rate on loans repayment | 1.00% |  |  |  |
Principal due on demand effective date | Dec. 31, 2020 |  |  |  |
Note receivable from affiliate |  | 34,000,000 | 38,200,000 |  |
Interest income including unused commitment fees on our loan |  | 2,100,000 | $ 1,800,000 | $ 200,000 |
Amount loaned |  | $ 6,000,000 |  |  |
Unsecured Revolving Demand Promissory | Valhi Inc | Subsequent Event |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Note receivable from affiliate |  |  |  |  | $ 40,000,000

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- Definition Maximum lending capacity under the terms noted per the related party credit facility. + References No definition available. + Details
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- Definition Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due after 1 year (or 1 business cycle). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6918054&loc=d3e56071-112765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(3)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(11)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-06(3)(a)(3)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e604059-122996 + Details
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- Definition The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin. + References No definition available. + Details
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