Temporary Equity, Decrease From Discontinued Operations

No definition available.

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- Definition

Temporary Equity, Result of Impairment

+ References

No definition available.

+ Details

Name:	acta_TemporaryEquityResultofImpairment
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

+ References

Reference 1: 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

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the purchase of noncontrolling interest during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

+ Details

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

- Definition

Value of accretion of temporary equity to its redemption value during the period.

+ References

No definition available.

+ Details

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

- Definition

Amount of decrease to net income for accretion of temporary equity to its redemption value to derive net income apportioned to common stockholders.

+ References

No definition available.

+ Details

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

- Definition

Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

+ 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 210.5-02.27(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

The portion of net income or loss attributable to temporary equity interest.

+ References

No definition available.

+ Details

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

- Details

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- Details

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- Details

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- Details

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Consolidated Businesses - Reconciliation of Activity Related to Redeemable Noncontrolling Interest (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation activity related to the redeemable non controlling interest
Beginning balance	$ 5,858
FolioDynamix impairment charge			$ (812)
Ending balance	3,041	$ 5,858
Payments to acquire additional interest in subsidiaries		5,400	$ 4,000
Ownership percentage			93.00%
GovDelivery
Reconciliation activity related to the redeemable non controlling interest
Accretion to value adjustment		1,000	$ 700
Payments to acquire additional interest in subsidiaries		$ 2,500	$ 1,900
Ownership percentage		94.00%	92.00%	91.00%
VelocityEHS
Reconciliation activity related to the redeemable non controlling interest
Payments to acquire additional interest in subsidiaries		$ 2,400	$ 1,400
Ownership percentage		99.00%	98.00%	96.00%
FolioDynamix
Reconciliation activity related to the redeemable non controlling interest
Payments to acquire additional interest in subsidiaries		$ 500
Redeemable Noncontrolling Interest
Reconciliation activity related to the redeemable non controlling interest
Beginning balance	5,858	10,506	$ 10,346
Redeemable noncontrolling interests portion of subsidiary net loss	(696)	(778)	(393)
Reduction to redeemable noncontrolling interests due to GovDelivery Sale		(4,338)
Accretion to estimated redemption value	834	4,937	4,704
Equity transfer among owners	(2,955)	(4,469)	(3,339)
Ending balance	$ 3,041	$ 5,858	$ 10,506