PENSION PLAN AND OTHER BENEFIT PLANS, Part 2 (Details) (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Basis average final years of employment, for benefit formula	The plan's defined benefit formula generally bases payments to retired employees upon their length of service multiplied by a percentage of the average monthly pay over the last five years of employment.
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Net actuarial loss(gain)	$ 6,486,975	$ (3,624,214)	$ (6,908,392)
Recognized actuarial loss	1,623,567	1,431,064	715,885
Amortization of prior service cost	(83,144)	(83,144)	(67,127)
Defined contribution plan [Abstract]
Number of employee annual hours for eligibility (in hours)	1000 hours
Defined contribution plan expense	327,584	322,090	331,689
Chemung common stock included in defined contribution plan assets (in shares)	178,133	189,337
Non-discretionary 401K contribution	193,192	70,995
Minimum [Member]
Estimated Future Employer Contributions [Abstract]
Unrecognized net loss increase threshold percentage for amortization of obligation (in hundredths)	10.00%
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	9,842,829	17,789,018
Prior service cost	21,958	35,814
Total before tax effects	9,864,787	17,824,832
Accumulated benefit obligation	31,182,957	32,247,008
Assumptions Used in Determining Benefit Obligation [Abstract]
Discount Rate (in hundredths)	4.92%	4.26%	4.95%
Assumed rate of future compensation increase (in hundredths)	5.00%	5.00%	5.00%
Net periodic benefit cost [Abstract]
Service cost, benefits earned during the year	1,194,869	1,073,938	993,364
Interest cost on projected benefit obligation	1,587,037	1,605,912	1,569,151
Expected return on plan assets	(2,824,014)	(2,742,609)	(2,340,373)
Amortization of net loss	1,579,266	1,410,144	706,419
Amortization of prior service cost	13,856	13,856	29,873
Net periodic cost, Total	1,551,014	1,361,241	958,434
Expected long-term return on plan assets evaluation frequency, description	three to five years
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Net actuarial loss(gain)	(6,366,923)	3,365,120	6,815,617
Recognized actuarial loss	(1,579,266)	(1,410,144)	(706,419)
Amortization of prior service cost	(13,856)	(13,856)	(29,873)
Total recognized in other comprehensive income (loss) (before tax effect)	(7,960,045)	1,941,120	6,079,325
Total recognized in net benefit cost and other comprehensive income (loss) (before tax effect)	(6,409,031)	3,302,361	7,037,759
Amounts expected to be recognized in net periodic cost during next fiscal year [Abstract]
Loss recognition	639,349
Prior service cost recognition	7,320
Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount Rate (in hundredths)	4.26%	4.95%	5.65%
Expected long-term rate of return on assets (in hundredths)	7.75%	8.00%	8.00%
Assumed rate of future compensation increase (in hundredths)	5.00%	5.00%	5.00%
Plan Assets - Target Allocations [Abstract]
Percentage of Plan Assets (in hundredths)	100.00%	100.00%
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	41,782,004	37,238,650	35,015,567
Future Expected Benefit Payments [Abstract]
2014	1,699,649
2015	1,751,122
2016	1,838,606
2017	1,946,144
2018	2,036,469
2019-2023	11,305,023
Pension Plan [Member] \| Carrying Value [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	41,782,004	37,238,650
Pension Plan [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	38,748,936	33,598,505
Pension Plan [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	3,033,068	3,640,145
Pension Plan [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Cash [Member]
Plan Assets - Target Allocations [Abstract]
Target Allocations - Minimum (in hundredths)	0.00%
Target Allocations - Maximum (in hundredths)	20.00%
Percentage of Plan Assets (in hundredths)	2.00%	2.00%
Expected Long-Term Rate of Return (in hundredths)	2.50%
Pension Plan [Member] \| Cash [Member] \| Carrying Value [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	981,992	703,229
Pension Plan [Member] \| Cash [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	981,992	703,229
Pension Plan [Member] \| Cash [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Cash [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Alternative Assets [Member]
Plan Assets - Target Allocations [Abstract]
Target Allocations - Minimum (in hundredths)	0.00%
Target Allocations - Maximum (in hundredths)	10.00%
Percentage of Plan Assets (in hundredths)	3.00%	3.00%
Expected Long-Term Rate of Return (in hundredths)	7.50%
Pension Plan [Member] \| Equity Securities - U.S. companies [Member] \| Carrying Value [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	27,169,984	21,579,185
Pension Plan [Member] \| Equity Securities - U.S. companies [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	27,169,984	21,579,185
Pension Plan [Member] \| Equity Securities - U.S. companies [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Equity Securities - U.S. companies [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Equity Securities - International companies [Member] \| Carrying Value [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	629,883
Pension Plan [Member] \| Equity Securities - International companies [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	629,883
Pension Plan [Member] \| Equity Securities - International companies [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Equity Securities - International companies [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| US Treasury and Government [Member] \| Carrying Value [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	3,308,718	3,468,448
Pension Plan [Member] \| US Treasury and Government [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	3,308,718	3,468,448
Pension Plan [Member] \| US Treasury and Government [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| US Treasury and Government [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Corporate bonds [Member] \| Carrying Value [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	2,770,935	3,371,255
Pension Plan [Member] \| Corporate bonds [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Corporate bonds [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	2,770,935	3,371,255
Pension Plan [Member] \| Corporate bonds [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Foreign bonds, notes & debentures [Member] \| Carrying Value [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	262,133	268,890
Pension Plan [Member] \| Foreign bonds, notes & debentures [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Foreign bonds, notes & debentures [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	262,133	268,890
Pension Plan [Member] \| Foreign bonds, notes & debentures [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Mutual Funds [Member] \| Carrying Value [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	7,288,242	7,217,760
Pension Plan [Member] \| Mutual Funds [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	7,288,242	7,217,760
Pension Plan [Member] \| Mutual Funds [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Mutual Funds [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0
Pension Plan [Member] \| Large-Cap Domestic Equities [Member]
Plan Assets - Target Allocations [Abstract]
Target Allocations - Minimum (in hundredths)	30.00%
Target Allocations - Maximum (in hundredths)	60.00%
Percentage of Plan Assets (in hundredths)	54.00%	51.00%
Expected Long-Term Rate of Return (in hundredths)	10.30%
Pension Plan [Member] \| Mid-Cap Domestic Equities [Member]
Plan Assets - Target Allocations [Abstract]
Target Allocations - Minimum (in hundredths)	0.00%
Target Allocations - Maximum (in hundredths)	20.00%
Percentage of Plan Assets (in hundredths)	8.00%	7.00%
Expected Long-Term Rate of Return (in hundredths)	10.60%
Pension Plan [Member] \| Small-Cap Domestic Equities [Member]
Plan Assets - Target Allocations [Abstract]
Target Allocations - Minimum (in hundredths)	0.00%
Target Allocations - Maximum (in hundredths)	15.00%
Percentage of Plan Assets (in hundredths)	3.00%	2.00%
Expected Long-Term Rate of Return (in hundredths)	10.80%
Pension Plan [Member] \| International Equities [Member]
Plan Assets - Target Allocations [Abstract]
Target Allocations - Minimum (in hundredths)	0.00%
Target Allocations - Maximum (in hundredths)	25.00%
Percentage of Plan Assets (in hundredths)	4.00%	4.00%
Expected Long-Term Rate of Return (in hundredths)	10.30%
Pension Plan [Member] \| Intermediate Fixed Income [Member]
Plan Assets - Target Allocations [Abstract]
Target Allocations - Minimum (in hundredths)	20.00%
Target Allocations - Maximum (in hundredths)	50.00%
Percentage of Plan Assets (in hundredths)	26.00%	31.00%
Expected Long-Term Rate of Return (in hundredths)	4.70%
Defined Benefit Health Care Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	148,081	218,936
Prior service cost	(628,000)	(725,000)
Total before tax effects	(479,919)	(506,064)
Assumptions Used in Determining Benefit Obligation [Abstract]
Discount Rate (in hundredths)	4.92%	4.26%	4.95%
Health care cost trend: Initial (in hundredths)	8.00%	9.00%	10.00%
Health care cost trend: Ultimate (in hundredths)	5.00%	5.00%	5.00%
Year ultimate cost trend reached	2018	2018	2018
Net periodic benefit cost [Abstract]
Service cost, benefits earned during the year	44,000	39,000	35,000
Interest cost on projected benefit obligation	66,000	71,000	72,000
Amortization of prior service cost	(97,000)	(97,000)	(97,000)
Recognized actuarial loss	10,000	1,000	0
Net periodic cost, Total	23,000	14,000	10,000
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Net actuarial loss(gain)	(60,855)	177,966	19,705
Recognized actuarial loss	(10,000)	(1,000)	0
Amortization of prior service cost	97,000	97,000	97,000
Total recognized in other comprehensive income (loss) (before tax effect)	26,145	273,966	116,705
Total recognized in net benefit cost and other comprehensive income (loss) (before tax effect)	49,145	287,966	126,705
Amounts expected to be recognized in net periodic cost during next fiscal year [Abstract]
Loss recognition	0
Prior service cost recognition	(97,000)
Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount Rate (in hundredths)	4.26%	4.95%	5.65%
Health care cost trend: Initial (in hundredths)	9.00%	10.00%	14.00%
Health care cost trend: Ultimate (in hundredths)	5.00%	5.00%	5.00%
Year ultimate cost trend reached	2018	2018	2020
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0	0
Future Expected Benefit Payments [Abstract]
2014	144,000
2015	154,000
2016	143,000
2017	132,000
2018	150,000
2019-2023	680,000
Defined Benefit Plan, Description [Abstract]
Retiree age eligibility, prior to amendment	55 years
Self insured health care plan employee contribution prior to plan amendment (in hundredths)	40.00%
Required premium in New York area under Medicare Blue PPO (in hundredths)	100.00%
Self insured health care plan employee contribution (in hundredths)	50.00%
Self insured health care plan Medicare Supplement Plan C contribution (in hundredths)	50.00%
Effect of 1% Change in health care trend rate [Abstract]
Benefit Obligation	15,000	4,000	10,000
Total service and interest cost	300	(100)	700
Benefit Obligation	(23,000)	(5,000)	(11,000)
Total service and interest cost	(1,500)	(500)	(500)
Estimated Future Employer Contributions [Abstract]
Estimated Future Employer Contributions in Next Fiscal Year	144,000
Average future working lifetime of active participants		14 years 4 months 6 days
Defined Benefit Health Care Plan [Member] \| Minimum [Member]
Defined Benefit Plan, Description [Abstract]
Defined Benefit Plan Retiree Age Eligibility	55 years
Defined Benefit Health Care Plan [Member] \| Maximum [Member]
Defined Benefit Plan, Description [Abstract]
Defined Benefit Plan Retiree Age Eligibility	65 years
Executive Supplemental Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	194,181	287,679
Prior service cost	0	0
Total before tax effects	194,181	287,679
Accumulated benefit obligation	1,042,253	1,092,439
Assumptions Used in Determining Benefit Obligation [Abstract]
Discount Rate (in hundredths)	4.92%	4.26%	4.95%
Assumed rate of future compensation increase (in hundredths)	5.00%	5.00%	5.00%
Net periodic benefit cost [Abstract]
Service cost, benefits earned during the year	40,015	34,770	30,625
Interest cost on projected benefit obligation	47,899	51,091	53,771
Recognized actuarial loss	34,301	19,920	9,466
Net periodic cost, Total	122,215	105,781	93,862
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Net actuarial loss(gain)	(59,197)	81,128	70,771
Recognized actuarial loss	(34,301)	(19,920)	(9,466)
Total recognized in other comprehensive income (loss) (before tax effect)	(93,498)	61,208	61,305
Total recognized in net benefit cost and other comprehensive income (loss) (before tax effect)	28,717	166,989	155,167
Amounts expected to be recognized in net periodic cost during next fiscal year [Abstract]
Loss recognition	20,652
Prior service cost recognition	0
Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount Rate (in hundredths)	4.26%	4.95%	5.65%
Assumed rate of future compensation increase (in hundredths)	5.00%	5.00%	5.00%
Fair Value Measurement of Plan Assets [Abstract]
Fair Value of Plan Assets	0	0	0
Future Expected Benefit Payments [Abstract]
2014	75,000
2015	75,000
2016	75,000
2017	75,000
2018	116,000
2019-2023	580,000
Estimated Future Employer Contributions [Abstract]
Estimated Future Employer Contributions in Next Fiscal Year	75,000
Balance in the plan	336,656	181,701
Total expense	$ 154,955	$ 181,701

Refers to the average future working lifetime of active participants.

No definition available.

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- Definition

Refers to the balance in the plan which was expensed during the period.

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No definition available.

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- Definition

For a defined benefit plan, the basis final years of employment compensation to average for benefit formula application.

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No definition available.

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- Definition

For a defined benefit plan, description of the evaluation period for expected long-term return on plan assets.

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No definition available.

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- Definition

The assumed health care cost trend rate for the next year used to measure the expected obligation for the cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

+ References

No definition available.

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- Definition

For a defined benefit plan, a retiree age eligibility.

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No definition available.

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- Definition

For a defined benefit plan, a retiree age eligibility, prior to a plan amendment.

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No definition available.

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- Definition

For a defined benefit plan self insured health care plan, the employee contribution percentage.

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No definition available.

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- Definition

For a defined benefit plan self insured health care plan, the employee contribution percentage prior to plan amendment.

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No definition available.

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- Definition

For a defined benefit plan self insured health care plan, the Medicare supplemental plan C contribution percentage.

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No definition available.

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- Definition

For a defined benefit plan self insured health care plan, the retiree premium contribution percentage for those in a specific geographic area covered under PPO provider.

+ References

No definition available.

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- Definition

The ultimate trend rate for health care costs used in the calculation of benefit obligations.

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No definition available.

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- Definition

Percentage as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

No definition available.

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- Definition

Year the ultimate health care cost trend rate is expected to be reached in the calculation of benefit obligations, in CCYY format.

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No definition available.

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- Definition

For a defined contribution plan, the number of sponsoring entity common stock shares included in plan assets.

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No definition available.

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- Definition

Amount of non-discretionary contributions made by an employer to a defined contribution plan.

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No definition available.

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- Definition

Number of annual service hours for employees to be eligible to participate in the defined contribution plan or plans described.

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No definition available.

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- Definition

Total expense related to unrecognized net loss.

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No definition available.

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- Definition

Amount of increase in plan's total unrecognized net loss threshold for benefit obligation amortization.

+ References

No definition available.

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- Definition

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503844

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

+ References

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The interest rate used to adjust for the time value of money for the plan.

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Expected rate of compensation increases (for pay-related plans).

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

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An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

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Amount of net gain (loss) recognized in net periodic benefit cost due to settlements and curtailments. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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The ultimate trend rate for health care costs.

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Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

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The amount of the cost recognized during the period for defined contribution plans.

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Before tax amount of the (increase) decrease in the value of the projected benefit obligation and the increase (decrease) in the value of the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption that has not been recognized in net periodic benefit cost.

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