Name:	emci_IncreaseDecreaseInDeferredPolicyAcquisitionCostsFromAffiliates
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

From affiliates, for entities with classified balance sheets, the net change during the reporting period in the value of other assets or liabilities used in operating activities, that are not otherwise defined in the taxonomy. For entities with unclassified balance sheets, the net change during the reporting period in the value of all other assets or liabilities used in operating activities.

No definition available.

Name:	emci_IncreaseDecreaseInOtherOperatingCapitalNetFromAffiliates
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

From affiliates, the net change in the beginning and end of period Property and Casualty Insurance Liabilities balances; shall be classified as cash flows from operating activities.

No definition available.

Name:	emci_IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilitiesFromAffiliates
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

From affiliates, the change, in the reserve for commissions and contingent commissions recorded on the balance sheet, is needed to adjust net income to arrive at net cash flows provided by (used in) operations.

No definition available.

Name:	emci_IncreaseDecreaseInReserveForCommissionsExpenseFromAffiliates
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

From affiliates, change during the period in the unearned portion of premiums written, excluding the portion amortized into income. Premiums written are initially booked as unearned premiums and are recognized as revenue over the known or estimated life of the policy.

No definition available.

Name:	emci_IncreaseDecreaseInUnearnedPremiumsFromAffiliates
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The cash outflow to affiliates from the distribution of an entity's earnings in the form of dividends to common shareholders.

No definition available.

Name:	emci_PaymentsOfDividendsCommonStockToAffiliates
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

Name:	us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.