Line of credit facility covenant consolidated tangible net worth.

No definition available.

Name:	egov_LineOfCreditFacilityCovenantConsolidatedTangibleNetWorth
Namespace Prefix:	egov_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The remaining available capacity under the credit facility to issue additional letters of credit as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	egov_LineOfCreditFacilityLetterOfCreditCapacityAvailableForSpecificPurposeOtherThanForTradePurchases
Namespace Prefix:	egov_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of credit facility, utilization fee rate.

+ References

No definition available.

+ Details

Name:	egov_LineOfCreditFacilityUtilizationFeeRate
Namespace Prefix:	egov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum Consolidated Leverage Ratio

+ References

No definition available.

+ Details

Name:	egov_MaximumConsolidatedLeverageRatio
Namespace Prefix:	egov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum effective period for letters of credit after expiration of the Company's credit agreement.

+ References

No definition available.

+ Details

Name:	egov_MaximumEffectivePeriodForLettersOfCreditAfterExpirationOfCreditAgreement
Namespace Prefix:	egov_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer.

+ References

No definition available.

+ Details

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

- Definition

Identification of whether the entity has been in compliance with any credit facility debt covenants during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ 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 210.5-02.19(b),22(b))

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

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase (decrease) of the credit facility.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=egov_UnsecuredCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=egov_CovenantRequirementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=egov_Group1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=egov_Group2Member
Namespace Prefix:
Data Type:	na
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Period Type:

Debt Obligations and Collateral Requirements - Additional Information (Detail) - USD ($) $ in Millions		9 Months Ended
	Jul. 09, 2015	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt instrument, covenant compliance		The Company was in compliance with each of these covenants at September 30, 2015.
Letters of credit, maximum effective in force period		1 year
Unsecured Credit Agreement \| Covenant Requirement
Debt Instrument [Line Items]
Consolidated leverage ratio	150.00%
Consolidated tangible net worth required	$ 36.0
Unsecured Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, amended expiration date	May 01, 2017
Credit facility, outstanding letters of credit		$ 1.2	$ 1.4
Credit facility, available capacity to issue additional letters of credit		3.8
Credit facility, available borrowing capacity		8.8
Credit facility, increase available capacity under the credit agreement		$ 50.0
Unsecured Credit Agreement \| Revolving Credit Facility \| Letter of Credit \| If the Company's consolidated leverage ratio is less than or equal to 1.25:1
Debt Instrument [Line Items]
Fees on outstanding letters of credit	1.15%
Consolidated leverage ratio	150.00%
Unsecured Credit Agreement \| Revolving Credit Facility \| Letter of Credit \| If the Company's consolidated leverage ratio is greater than 1.25:1
Debt Instrument [Line Items]
Fees on outstanding letters of credit	1.25%
Consolidated leverage ratio	150.00%