XML 65 R49.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Statutory Balances and Accounting Practices (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Statutory Balances And Accounting Practices [Abstract] |
Schedule Of Statutory Net Income And Capital And Surplus | The following table presents the statutory net income, and statutory capital and surplus of the Insurance Companies, as reported to regulatory authorities:
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
| (Amounts in thousands)
Statutory net income (loss) (1) | $ | 446,405 |  |  | $ | (35,590) |  |  | $ | (184,292) |
Statutory capital and surplus | $ | 2,030,460 |  |  | $ | 1,667,187 |  |  | $ | 1,502,424 |
__________ (1)Statutory net income (loss) reflects differences from GAAP net income (loss), including changes in the fair value of the investment portfolio as a result of the application of the fair value option.

X
- Definition Schedule Of Statutory Net Income And Capital And Surplus [Table Text Block]. + References No definition available. + Details
Name: | mcy_ScheduleOfStatutoryNetIncomeAndCapitalAndSurplusTableTextBlock
Namespace Prefix: | mcy_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Statutory Balances And Accounting Practices [Abstract] + References No definition available. + Details
Name: | mcy_StatutoryBalancesAndAccountingPracticesAbstract
Namespace Prefix: | mcy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration