Carrying Value and Estimated Fair Values for Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Indemnification assets
Software costs reimbursement, Carrying Amount	$ 4,540	$ 6,099	$ 7,113
Expected reimbursements, Carrying Amount			351
Financial liabilities:
Senior secured term loan, Carrying Amount		484,414	313,333
Senior notes, Carrying Amount		252,347	210,500
Indemnification assets:
Software cost reimbursement, Fair Value	4,540	6,099	7,113
Expected reimbursements, Fair Value			351
Financial liabilities:
secured term loan, Fair Value		497,498	317,979
Senior notes, Fair Value		275,550	213,921
New Senior Secured Term Loan
Financial liabilities:
Senior secured term loan, Carrying Amount	693,738
Financial liabilities:
secured term loan, Fair Value	$ 694,900

Expected Reimbursement Carrying Value

No definition available.

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Period Type:	instant

- 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

- Details

Name:	evtc_FinancialLiabilitiesAbstract
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Balance Type:	na
Period Type:	duration

- Details

Name:	evtc_IndemnificationAssetsAbstract
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Balance Type:	na
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- Details

Name:	evtc_IndemnificationAssetsFairValueAbstract
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Balance Type:	na
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- Definition

Including the noncurrent portions, fair value as of balance sheet date of Notes with the highest claim on assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

No definition available.

+ Details

Name:	evtc_SeniorNotesFairValue
Namespace Prefix:	evtc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Software Cost Reimbursement Carrying Value

+ References

No definition available.

+ Details

Name:	evtc_SoftwareCostReimbursementCarryingValue
Namespace Prefix:	evtc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

- Details

Name:	us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant