XML 31 R81.htm IDEA: XBRL DOCUMENT
v2.4.1.9

STOCK-BASED COMPENSATION (Equity Plans) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 12 Months Ended | 3 Months Ended
--- | --- | --- | ---
Jan. 11, 2012 | Dec. 31, 2014 | Jun. 30, 2013
2012 Directors Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares authorized to be reserved for issuance (in shares) | 600,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = epam_NonEmployeeDirectorCompensationPlanTwentyTwelveMember |  |
2012 Directors Plan expiration period (in years) | 10 years |  |
2012 Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common stock shares available for issuance (in shares) |  | 4,785,761 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = epam_LongTermIncentivePlanTwentyTwelveMember |
2006 Plan | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common stock shares subject to outstanding awards that expire or terminate that are available for awards to be granted (in shares) |  | 1,743,034 epam_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesAvailableForGrantAdditionalSharesAuthorizedInPeriod / us-gaap_PlanNameAxis = epam_LongTermIncentivePlanTwentyZeroSixMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
2006 Plan | Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options issued expiration period (in years) |  | 10 years |
Empathy Lab, LLC |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Non-vested common stock shares issued (in shares) |  |  | 1,483 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / dei_LegalEntityAxis = epam_EmpathyLabLLCMember
Percentage of restricted stock vested |  |  | 33.33%epam_PercentageOfRestrictedStockVested / dei_LegalEntityAxis = epam_EmpathyLabLLCMember
Fair value at grant date |  |  | $ 42 epam_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodFairValue / dei_LegalEntityAxis = epam_EmpathyLabLLCMember

X
- Definition Percentage of Restricted Stock Vested + References No definition available. + Details
Name: | epam_PercentageOfRestrictedStockVested
Namespace Prefix: | epam_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period When Stock Options Expire In Years + References No definition available. + Details
Name: | epam_PeriodWhenStockOptionsExpireInYears
Namespace Prefix: | epam_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value + References No definition available. + Details
Name: | epam_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodFairValue
Namespace Prefix: | epam_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share Based Compensation Arrangement by Share Based Payment Award, Expiration Term + References No definition available. + Details
Name: | epam_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationTerm
Namespace Prefix: | epam_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum number of awards outstanding under the plan that are available for issuance if cancelled/forfeited. + References No definition available. + Details
Name: | epam_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesAvailableForGrantAdditionalSharesAuthorizedInPeriod
Namespace Prefix: | epam_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=epam_EmpathyLabLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=epam_LongTermIncentivePlanTwentyTwelveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=epam_LongTermIncentivePlanTwentyZeroSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=epam_NonEmployeeDirectorCompensationPlanTwentyTwelveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |