XML 54 R41.htm IDEA: XBRL DOCUMENT v3.22.0.1
Related Party Transactions - Additional Information (Detail) - USD ($)
11 Months Ended 12 Months Ended
Nov. 30, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Related Party Transaction [Line Items]          
Note receivable from affiliate   $ 18,700,000 $ 29,500,000    
Contran Corporation | Intercorporate Services Agreements Fees          
Related Party Transaction [Line Items]          
Related party transaction expense   3,400,000 3,400,000 $ 3,400,000  
Tall Pines Insurance Company or EWI RE Inc          
Related Party Transaction [Line Items]          
Related party transaction expense $ 2,300,000 2,900,000 2,800,000    
Tall Pines Insurance Company or EWI RE Inc | Policies Written by Tall Pines Insurance Company          
Related Party Transaction [Line Items]          
Related party transaction expense   900,000 700,000    
Unsecured Revolving Demand Promissory | Valhi Inc          
Related Party Transaction [Line Items]          
Maximum loan amount         $ 30,000,000
Interest rate on loans repayment         1.00%
Principal due on demand effective date         Dec. 31, 2023
Note receivable from affiliate   18,700,000 29,500,000    
Interest income including unused commitment fees on our loan   $ 1,200,000 $ 1,500,000 $ 2,400,000