DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS, Recurring Measurement Inputs (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Recurring [Member]
Fixed maturity securities available-for-sale [Abstract]
U.S. treasury	$ 9,612,047	$ 4,984,902
U.S. government-sponsored agencies	137,427,115	162,442,630
Obligations of state and political subdivisions	373,573,415	370,962,114
Commercial mortgage-backed	68,270,393	80,349,182
Residential mortgage-backed	88,006,679	47,789,604
Other asset-backed	10,379,266	11,286,848
Corporate	309,795,648	321,979,577
Total fixed maturity securities available-for-sale	997,064,563	999,794,857
Common Stock [Abstract]
Financial services	25,808,286	18,093,388
Information technology	16,119,834	16,925,764
Healthcare	21,458,416	19,023,849
Consumer staples	13,225,367	13,609,527
Consumer discretionary	20,762,526	17,090,547
Energy	21,560,010	19,430,330
Industrials	10,249,748	8,574,816
Other	19,693,809	18,681,440
Non-redeemable preferred stocks	8,699,220	8,864,164
Total equity securities available-for-sale	157,577,216	140,293,825
Short term investments	33,921,749	53,418,914
Recurring [Member] \| Quoted prices in active markets for identical assets (Level 1) [Member]
Fixed maturity securities available-for-sale [Abstract]
U.S. treasury	0	0
U.S. government-sponsored agencies	0	0
Obligations of state and political subdivisions	0	0
Commercial mortgage-backed	0	0
Residential mortgage-backed	0	0
Other asset-backed	0	0
Corporate	0	0
Total fixed maturity securities available-for-sale	0	0
Common Stock [Abstract]
Financial services	25,805,679	18,090,987
Information technology	16,119,834	16,925,764
Healthcare	21,458,416	19,023,849
Consumer staples	13,225,367	13,609,527
Consumer discretionary	20,762,526	17,090,547
Energy	21,560,010	19,430,330
Industrials	10,249,748	8,574,816
Other	19,693,809	18,681,440
Non-redeemable preferred stocks	8,699,220	8,864,164
Total equity securities available-for-sale	157,574,609	140,291,424
Short term investments	33,921,749	42,062,664
Recurring [Member] \| Significant other observable inputs (Level 2) [Member]
Fixed maturity securities available-for-sale [Abstract]
U.S. treasury	9,612,047	4,984,902
U.S. government-sponsored agencies	137,427,115	162,442,630
Obligations of state and political subdivisions	373,573,415	370,962,114
Commercial mortgage-backed	68,270,393	80,349,182
Residential mortgage-backed	88,006,679	47,789,604
Other asset-backed	10,379,266	11,286,848
Corporate	308,847,358	321,979,577
Total fixed maturity securities available-for-sale	996,116,273	999,794,857
Common Stock [Abstract]
Financial services	0	0
Information technology	0	0
Healthcare	0	0
Consumer staples	0	0
Consumer discretionary	0	0
Energy	0	0
Industrials	0	0
Other	0	0
Non-redeemable preferred stocks	0	0
Total equity securities available-for-sale	0	0
Short term investments	0	11,356,250
Recurring [Member] \| Significant unobservable inputs (Level 3) [Member]
Fixed maturity securities available-for-sale [Abstract]
U.S. treasury	0	0
U.S. government-sponsored agencies	0	0
Obligations of state and political subdivisions	0	0
Commercial mortgage-backed	0	0
Residential mortgage-backed	0	0
Other asset-backed	0	0
Corporate	948,290	0
Total fixed maturity securities available-for-sale	948,290	0
Common Stock [Abstract]
Financial services	2,607	2,401
Information technology	0	0
Healthcare	0	0
Consumer staples	0	0
Consumer discretionary	0	0
Energy	0	0
Industrials	0	0
Other	0	0
Non-redeemable preferred stocks	0	0
Total equity securities available-for-sale	2,607	2,401
Short term investments	0	0
Not Reported At Fair Value [Member]
Liabilities [Abstract]
Surplus notes	10,222,310	18,835,954
Not Reported At Fair Value [Member] \| Quoted prices in active markets for identical assets (Level 1) [Member]
Liabilities [Abstract]
Surplus notes	0	0
Not Reported At Fair Value [Member] \| Significant other observable inputs (Level 2) [Member]
Liabilities [Abstract]
Surplus notes	0	0
Not Reported At Fair Value [Member] \| Significant unobservable inputs (Level 3) [Member]
Liabilities [Abstract]
Surplus notes	$ 10,222,310	$ 18,835,954

No definition available.

Name:	emci_AssetBackedSecuritiesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of debt securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleDebtSecuritiesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleEquitySecuritiesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in consumer discretionary companies equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleSecuritiesConsumerDiscretionaryFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in consumer staples companies equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleSecuritiesConsumerStaplesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	emci_AvailableForSaleSecuritiesDebtSecuritiesAbstract
Namespace Prefix:	emci_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in energy companies equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleSecuritiesEnergyFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in financial services companies equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleSecuritiesFinancialServicesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in healthcare companies equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleSecuritiesHealthcareFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in industrial companies equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleSecuritiesIndustrialsFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in information technology companies equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleSecuritiesInformationTechnologyFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in non-redeemable preferred stock of companies neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleSecuritiesNonRedeemablePreferredStockFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in other companies equity securities neither classified as trading or held-to-maturity securities. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in equity securities which are categorized as Available-for-sale.

+ References

No definition available.

+ Details

Name:	emci_AvailableForSaleSecuritiesOtherFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

+ References

No definition available.

+ Details

Name:	emci_CommercialMortgageBackedSecuritiesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	emci_CommonStockAbstract
Namespace Prefix:	emci_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

+ References

No definition available.

+ Details

Name:	emci_CorporateBondsFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

+ References

No definition available.

+ Details

Name:	emci_ObligationsOfStateAndPoliticalSubdivisionsFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

+ References

No definition available.

+ Details

Name:	emci_ResidentialMortgageBackedSecuritiesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

+ References

No definition available.

+ Details

Name:	emci_ShortTermInvestmentsFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents a certain statement of financial position liability caption which represents a class of financial instruments issued by insurance entities (surplus notes) that are includable in surplus for statutory accounting purposes as prescribed or permitted by state laws and regulations that are liabilities of the issuer carried at cost but measured at fair value for this disclosure.

+ References

No definition available.

+ Details

Name:	emci_SurplusNotesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

+ References

No definition available.

+ Details

Name:	emci_UnitedStatesGovernmentAgencyDebtSecuritiesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

+ References

No definition available.

+ Details

Name:	emci_UnitedStatesTreasuryDebtSecuritiesFairValueDisclosure
Namespace Prefix:	emci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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