| Amount of amortization expense (reversal of amortization expense) for deferred policy acquisition costs, excluding accrued interest on unamortized balance. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Deferred Policy Acquisition Costs, Amortization Expense, Excluding Accrued Interest | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Deferred Policy Acquisition Costs, Amortization Expense, Excluding Accrued Interest, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |