XML 12 R39.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Restructuring - Schedule of Restructuring Charges (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014
Current estimate of remaining accrued restructuring charges |
Ending Balance | $ 1,332,186 us-gaap_RestructuringReserve
Salary continuation liability |
Current estimate of remaining accrued restructuring charges |
Beginning Balance | 615,721 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_SalaryExpenseRestructuringMember
Payments | (615,721)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = epm_SalaryExpenseRestructuringMember
Adjustment to Cost | 0 us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = epm_SalaryExpenseRestructuringMember
Ending Balance | 0 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_SalaryExpenseRestructuringMember
Incentive compensation costs |
Current estimate of remaining accrued restructuring charges |
Beginning Balance | 185,525 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_CashIncentiveRestructuringMember
Payments | (185,525)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = epm_CashIncentiveRestructuringMember
Adjustment to Cost | 0 us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = epm_CashIncentiveRestructuringMember
Ending Balance | 0 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_CashIncentiveRestructuringMember
Other benefit costs and employer taxes |
Current estimate of remaining accrued restructuring charges |
Beginning Balance | 154,575 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_OtherBenefitsRestructuringMember
Payments | (110,144)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = epm_OtherBenefitsRestructuringMember
Adjustment to Cost | (44,431)us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = epm_OtherBenefitsRestructuringMember
Ending Balance | 0 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = epm_OtherBenefitsRestructuringMember
Accrued restructuring charges |
Current estimate of remaining accrued restructuring charges |
Beginning Balance | 955,821 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember
Payments | (911,390)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember
Adjustment to Cost | (44,431)us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember
Ending Balance | $ 0 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember

X
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_PaymentsForRestructuring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
Name: | us-gaap_RestructuringReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394291&loc=d3e17658-110867 + Details
Name: | us-gaap_RestructuringReserveAccrualAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringReserveRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=epm_CashIncentiveRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=epm_OtherBenefitsRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=epm_SalaryExpenseRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_EmployeeSeveranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |