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 | ' |