| Present Value of Future Insurance Profits, Amortization Expense, Excluding Accrued Interest | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Present Value of Future Insurance Profits, Amortization Expense, Excluding Accrued Interest, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Amount of amortization expense (reversal of amortization expense) for present value of future profits of insurance contract acquired in business combination, excluding accrued interest on unamortized balance. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |