Goodwill acquired during period net of impairment.

No definition available.

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Namespace Prefix:	acta_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a,h)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a,h)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

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

- Details

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Period Type:	duration

- Details

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Summary of Activity Related to Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2012	Nov. 03, 2014
Goodwill [Line Items]
Goodwill, Gross Carrying Amount Beginning Balance			$ 88,230us-gaap_GoodwillGross
Goodwill, Gross Carrying Amount Ending Balance	90,770us-gaap_GoodwillGross	264,490us-gaap_GoodwillGross	88,230us-gaap_GoodwillGross
Goodwill, Accumulated Impairment Losses Beginning Balance			(304)
Goodwill, Accumulated Impairment Losses Ending Balance	(304)	(304)	(304)
Goodwill, Net Carrying Amount Beginning Balance			87,926us-gaap_Goodwill
Goodwill, Net Carrying Amount Ending Balance	90,466us-gaap_Goodwill	264,186us-gaap_Goodwill	87,926us-gaap_Goodwill
Bolt's acquisition of Superior Access
Goodwill [Line Items]
Increase in goodwill, Gross Carrying Amount	2,540
Increase in goodwill, Net Carrying Amount	2,540
MSDSonline's acquisition of KMI
Goodwill [Line Items]
Increase in goodwill, Gross Carrying Amount		6,735
Increase in goodwill, Net Carrying Amount		6,735
GovDelivery's acquisition of NuCivic
Goodwill [Line Items]
Increase in goodwill, Gross Carrying Amount		1,257
Increase in goodwill, Net Carrying Amount		1,257
Bolt's acquisition of Ludwing
Goodwill [Line Items]
Increase in goodwill, Gross Carrying Amount		314
Increase in goodwill, Net Carrying Amount		314
FolioDynamix
Goodwill [Line Items]
Increase in goodwill, Gross Carrying Amount		165,414
Goodwill, Net Carrying Amount Beginning Balance				165,414
Increase in goodwill, Net Carrying Amount		165,414
Goodwill, Net Carrying Amount Ending Balance				$ 165,414