EMPLOYEE RETIREMENT PLANS (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Percentage of pool participation (in hundredths)	30.00%	30.00%	30.00%
Other benefit plans expenses (including 401(k)) allocated to the Company	$ 1,457,211	$ 1,822,925	$ 1,523,675
Pension Plans [Member] | EMC Insurance Group, Inc. [Member]
Assets [Abstract]
Prepaid pension and postretirement benefits	18,310,029	1,413,104
Liability [Abstract]
Pension and postretirement benefits	(3,401,045)	(3,800,987)
Net amount recognized	14,908,984	(2,387,883)
Amounts recognized in the Company's consolidated balance sheets under the caption "accumulated other comprehensive income", before deferred income taxes [Abstract]
Net actuarial loss	(7,605,752)	(23,299,008)
Prior service (cost) credit	(34,482)	(49,643)
Net amount recognized	(7,640,234)	(23,348,651)
Amounts that will be amortized from accumulated other comprehensive income (loss) in next fiscal year [Abstract]
Amortization of net actuarial loss	81,483
Amortization of prior service (cost) credit	9,695
Amounts recognized in the Company's consolidated statements of comprehensive income [Abstract]
Net actuarial gain (loss)	15,693,256	1,620,026
Prior service (cost) credit	15,161	87,981
Net amount recognized	15,708,417	1,708,007
Components of net periodic benefit cost [Abstract]
Net periodic benefit cost	3,013,316	4,115,440	2,983,679
Pension Plans [Member] | EMC Insurance Companies [Member]
Change in projected benefit obligation [Abstract]
Benefit obligation at beginning of year	247,290,081	225,100,396
Service cost	13,212,796	12,386,021	11,527,452
Interest cost	7,656,037	8,818,790	9,703,193
Actuarial loss	(14,458,374)	14,251,377
Benefits paid	(14,591,200)	(13,266,503)
Medicare subsidy reimbursements	0	0
Plan amendments	0	0
Projected benefit obligation at end of year	239,109,340	247,290,081	225,100,396
Change in plan assets [Abstract]
Fair value plan of plan assets at beginning of year	240,033,882	209,926,692
Actual return on plan assets	48,623,187	27,715,290
Employer contributions	14,684,459	15,658,403
Benefits paid	(14,591,200)	(13,266,503)
Fair value of plan assets at end of year	288,750,328	240,033,882	209,926,692
Funded status	49,640,988	(7,256,199)
Components of net periodic benefit cost [Abstract]
Service cost	13,212,796	12,386,021	11,527,452
Interest cost	7,656,037	8,818,790	9,703,193
Expected return on plan assets	(17,150,462)	(14,925,445)	(15,506,042)
Amortization of net actuarial loss	5,962,361	6,808,576	3,528,096
Amortization of prior service cost	50,329	291,152	432,134
Net periodic benefit cost	9,731,061	13,379,094	9,684,833
Weighted-average assumptions used to measure the benefit obligations [Abstract]
Discount rate (in hundredths)	4.17%	3.24%
Weighted-average assumptions used to measure the net periodic benefit costs [Abstract]
Discount rate (in hundredths)	3.24%	4.13%	5.00%
Expected long-term rate of return on plan assets (in hundredths)	7.25%	7.25%	7.50%
Expected future benefit payments to be paid from the plans over the next ten years [Abstract]
2014	21,632,278
2015	24,410,864
2016	19,469,861
2017	20,228,563
2018	20,981,451
2019 - 2023	113,113,599
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	288,750,328	240,033,882	209,926,692
Qualified Pension Plan [Member] | EMC Insurance Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans, vest years of service	3 years
Defined benefit plan, age of attainment years	55 years
Change in plan assets [Abstract]
Fair value plan of plan assets at beginning of year	240,033,882
Fair value of plan assets at end of year	288,750,328	240,033,882
Weighted-average assumptions used to measure the benefit obligations [Abstract]
Rate of compensation increase (in hundredths)	4.73%	4.73%
Weighted-average assumptions used to measure the net periodic benefit costs [Abstract]
Rate of compensation increase (in hundredths)	4.73%	4.73%	4.73%
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	288,750,328	240,033,882
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Defined Benefit Plan Estimated Future Parent Total Contributions Next Fiscal Year	15,000,000
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Bond and Mortgage Separate Account [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	32,842,844	29,689,019
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	32,842,844	29,689,019
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | U.S. Stock Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	110,278,544	123,183,685
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	110,278,544	123,183,685
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | International Stock Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	62,839,927	46,927,216
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	62,839,927	46,927,216
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | U.S. Bond Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	60,200,104	34,412,351
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	60,200,104	34,412,351
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Real Estate Separate Account [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	13,758,266
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	13,758,266
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Short-Term Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	7,672,422	1,199,931
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	7,672,422	1,199,931
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Real Estate Securities Fund [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	1,158,221	4,621,680
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	1,158,221	4,621,680
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	1,158,221	4,621,680
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	1,158,221	4,621,680
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Bond and Mortgage Separate Account [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | U.S. Stock Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | International Stock Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | U.S. Bond Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Real Estate Separate Account [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Short-Term Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Real Estate Securities Fund [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	1,158,221	4,621,680
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	1,158,221	4,621,680
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	287,592,107	235,412,202
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	287,592,107	235,412,202
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | Bond and Mortgage Separate Account [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	32,842,844	29,689,019
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	32,842,844	29,689,019
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | U.S. Stock Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	110,278,544	123,183,685
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	110,278,544	123,183,685
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | International Stock Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	62,839,927	46,927,216
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	62,839,927	46,927,216
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | U.S. Bond Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	60,200,104	34,412,351
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	60,200,104	34,412,351
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | Real Estate Separate Account [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	13,758,266
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	13,758,266
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | Short-Term Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	7,672,422	1,199,931
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	7,672,422	1,199,931
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | Real Estate Securities Fund [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | Bond and Mortgage Separate Account [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | U.S. Stock Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | International Stock Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | U.S. Bond Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | Real Estate Separate Account [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | Short-Term Funds Pooled Accounts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Qualified Pension Plan [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | Real Estate Securities Fund [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
Non-Qualified Pension Plan [Member] | EMC Insurance Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans, vest years of service	3 years
Plan assets exceeded the accumulated benefit obligation [Abstract]
Projected benefit obligation	10,856,004	11,931,828
Accumulated benefit obligation	10,485,220	10,889,563
Fair value of plan assets	0	0
Weighted-average assumptions used to measure the benefit obligations [Abstract]
Rate of compensation increase (in hundredths)	4.68%	4.68%
Weighted-average assumptions used to measure the net periodic benefit costs [Abstract]
Rate of compensation increase (in hundredths)	4.68%	4.68%	4.68%
Postretirement Benefit Plans [Member] | Gross [Member]
Expected future benefit payments to be paid from the plans over the next ten years [Abstract]
2014	4,863,986
2015	3,030,138
2016	3,095,475
2017	3,210,403
2018	3,339,653
2019 - 2023	17,222,818
Postretirement Benefit Plans [Member] | Medicare Subsidy [Member]
Expected future benefit payments to be paid from the plans over the next ten years [Abstract]
2014	566,889
2015	0
2016	0
2017	0
2018	0
2019 - 2023	0
Postretirement Benefit Plans [Member] | Net [Member]
Expected future benefit payments to be paid from the plans over the next ten years [Abstract]
2014	4,297,097
2015	3,030,138
2016	3,095,475
2017	3,210,403
2018	3,339,653
2019 - 2023	17,222,818
Postretirement Benefit Plans [Member] | EMC Insurance Group, Inc. [Member]
Change in projected benefit obligation [Abstract]
Plan amendments	26,936,515
Assets [Abstract]
Prepaid pension and postretirement benefits	4,810,529	0
Liability [Abstract]
Pension and postretirement benefits	0	(26,913,646)
Net amount recognized	4,810,529	(26,913,646)
Amounts recognized in the Company's consolidated balance sheets under the caption "accumulated other comprehensive income", before deferred income taxes [Abstract]
Net actuarial loss	(6,827,263)	(15,133,387)
Prior service (cost) credit	30,828,393	4,554,453
Net amount recognized	24,001,130	(10,578,934)
Amounts that will be amortized from accumulated other comprehensive income (loss) in next fiscal year [Abstract]
Amortization of net actuarial loss	462,971
Amortization of prior service (cost) credit	3,316,777
Amounts recognized in the Company's consolidated statements of comprehensive income [Abstract]
Net actuarial gain (loss)	8,306,124	491,692
Prior service (cost) credit	26,273,940	508,273
Net amount recognized	34,580,064	999,965
Components of net periodic benefit cost [Abstract]
Net periodic benefit cost	2,911,785	3,287,184	2,111,176
Postretirement Benefit Plans [Member] | EMC Insurance Companies [Member]
Change in projected benefit obligation [Abstract]
Benefit obligation at beginning of year	155,102,015	144,354,348
Service cost	6,299,916	6,150,118	4,602,488
Interest cost	6,171,884	6,536,842	5,998,581
Actuarial loss	(18,581,923)	4,086,259
Benefits paid	(2,587,765)	(2,787,354)
Medicare subsidy reimbursements	305,971	579,650
Plan amendments	(96,704,413)	(3,817,848)
Projected benefit obligation at end of year	50,005,685	155,102,015	144,354,348
Change in plan assets [Abstract]
Fair value plan of plan assets at beginning of year	57,815,079	53,446,305
Actual return on plan assets	11,548,326	5,656,128
Employer contributions	500,000	1,500,000
Benefits paid	(2,587,765)	(2,787,354)
Fair value of plan assets at end of year	67,275,640	57,815,079	53,446,305
Funded status	17,269,955	(97,286,936)
Components of net periodic benefit cost [Abstract]
Service cost	6,299,916	6,150,118	4,602,488
Interest cost	6,171,884	6,536,842	5,998,581
Expected return on plan assets	(3,631,000)	(3,219,175)	(2,929,894)
Amortization of net actuarial loss	3,694,018	4,008,614	1,776,849
Amortization of prior service cost	(2,491,125)	(2,131,256)	(2,131,256)
Net periodic benefit cost	10,043,693	11,345,143	7,316,768
Weighted-average assumptions used to measure the benefit obligations [Abstract]
Discount rate (in hundredths)	4.71%	4.03%
Weighted-average assumptions used to measure the net periodic benefit costs [Abstract]
Discount rate (in hundredths)	4.03%	4.59%	5.50%
Expected long-term rate of return on plan assets (in hundredths)	6.50%	6.25%	6.25%
Assumed health care cost trend rate [Abstract]
Health care cost trend rate assumed for next year (in hundredths)	7.50%	7.75%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) (in hundredths)	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2024	2024
One-percentage-point change in the assumed health care cost trend rate [Abstract]
Effect on total of service and interest cost, Increase	2,655,000
Effect on total of service and interest cost, Decrease	(2,048,969)
Effect on postretirement benefit obligation, Increase	60,276
Effect on postretirement benefit obligation, Decrease	(60,276)
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	67,275,640	57,815,079	53,446,305
VEBA Trust [Member] | EMC Insurance Companies [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	67,275,640	57,815,079
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	67,275,640	57,815,079
VEBA Trust [Member] | EMC Insurance Companies [Member] | Money Market Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	574,763	2,478,233
Fair values of the plan assets held [Abstract]
Net asset value per share (in dollars per share)	$ 1.00
Assets, Fair Value Disclosure	574,763	2,478,233
VEBA Trust [Member] | EMC Insurance Companies [Member] | Emerging Markets ETF [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	3,224,265	3,489,949
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	3,224,265	3,489,949
VEBA Trust [Member] | EMC Insurance Companies [Member] | Equity Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	39,709,720	29,398,816
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	39,709,720	29,398,816
VEBA Trust [Member] | EMC Insurance Companies [Member] | Tax Exempt Fixed Income Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	2,865,017	2,908,889
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	2,865,017	2,908,889
VEBA Trust [Member] | EMC Insurance Companies [Member] | International Equity Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	7,674,589	6,666,766
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	7,674,589	6,666,766
VEBA Trust [Member] | EMC Insurance Companies [Member] | Life Insurance Contracts [Member]
Change in plan assets [Abstract]
Fair value plan of plan assets at beginning of year	12,872,426
Fair value of plan assets at end of year	13,227,286	12,872,426
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	13,227,286	12,872,426
Reconciliation of the plan assets measured at fair value using significant unobservable inputs (Level 3) [Roll Forward]
Beginning balance	12,872,426	12,490,608
Actual return on plan assets [Abstract]
Increase in cash accumulation value of life insurance contracts	354,860	381,818
Balance at end of period	13,227,286	12,872,426
VEBA Trust [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	54,048,354	44,942,653
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	54,048,354	44,942,653
VEBA Trust [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Money Market Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	574,763	2,478,233
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	574,763	2,478,233
VEBA Trust [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Emerging Markets ETF [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	3,224,265	3,489,949
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	3,224,265	3,489,949
VEBA Trust [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Equity Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	39,709,720	29,398,816
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	39,709,720	29,398,816
VEBA Trust [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Tax Exempt Fixed Income Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	2,865,017	2,908,889
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	2,865,017	2,908,889
VEBA Trust [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | International Equity Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	7,674,589	6,666,766
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	7,674,589	6,666,766
VEBA Trust [Member] | EMC Insurance Companies [Member] | Quoted prices in active markets for identical assets (Level 1) [Member] | Life Insurance Contracts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | Money Market Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | Emerging Markets ETF [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | Equity Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | Tax Exempt Fixed Income Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | International Equity Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant other observable inputs (Level 2) [Member] | Life Insurance Contracts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	13,227,286	12,872,426
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	13,227,286	12,872,426
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | Money Market Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | Emerging Markets ETF [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | Equity Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | Tax Exempt Fixed Income Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | International Equity Mutual Funds [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	0	0
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	0	0
VEBA Trust [Member] | EMC Insurance Companies [Member] | Significant unobservable inputs (Level 3) [Member] | Life Insurance Contracts [Member]
Change in plan assets [Abstract]
Fair value of plan assets at end of year	13,227,286	12,872,426
Fair values of the plan assets held [Abstract]
Assets, Fair Value Disclosure	$ 13,227,286	$ 12,872,426