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Fair Value Measurements for Assets at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Indemnification assets: |  |  |
Software cost reimbursement | $ 4,540 | $ 6,099 | $ 7,113
Expected reimbursement |  |  | 351
Fair Value, Measurements, Recurring | Level 1 |  |  |
Indemnification assets: |  |  |
Software cost reimbursement |  |  |
Expected reimbursement |  |  |
Fair Value, Measurements, Recurring | Level 2 |  |  |
Indemnification assets: |  |  |
Software cost reimbursement |  |  |
Expected reimbursement |  |  |
Fair Value, Measurements, Recurring | Level 3 |  |  |
Indemnification assets: |  |  |
Software cost reimbursement | 4,540 | 6,099 | 7,113
Expected reimbursement |  |  | $ 351

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- Definition Expected reimbursement fair value + References No definition available. + Details
Name: | evtc_ExpectedReimbursementFairValue
Namespace Prefix: | evtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | evtc_IndemnificationAssetsAbstract
Namespace Prefix: | evtc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Software subsidy fair value. + References No definition available. + Details
Name: | evtc_SoftwareCostReimbursementFairValue
Namespace Prefix: | evtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant