v2.4.1.9

OTHER INVESTMENTS (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2007 | Dec. 31, 2008 | Dec. 31, 2010 | Sep. 30, 2012 | Dec. 31, 2011 | Apr. 30, 2011 | Mar. 31, 2011 | Feb. 28, 2010
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of unlisted entities | 5 acts_EquityMethodInvestmentNumberOfUnlistedEntities |  |  |  |  |  |  |  |  |  |
Impairment charges |  | $ 681 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet | $ 2,543 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet |  |  |  |  |  |  |  |
Write down of investments |  | 819 us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment |  |  |  |  |  |  |  |  |
Carrying value | 27,352 us-gaap_EquityMethodInvestments | 17,843 us-gaap_EquityMethodInvestments |  |  |  |  |  |  |  |  |
AMC [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  | 5.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_AMCHoldingLimitedMember |  |  |  |  |  |  |
Capital investment |  |  |  | 27,000 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_AMCHoldingLimitedMember |  |  |  |  |  |  |
Carrying value |  |  |  |  |  |  |  |  |  |  |
Actar [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  | 7.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_ActarLimitedMember |  |  |  |  |  |
Capital investment |  |  |  |  | 3,000 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_ActarLimitedMember |  |  |  |  |  |
Carrying value |  |  |  |  |  |  |  |  |  |  |
Hi-Trend [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  | 10.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_HiTrendInvestmentHoldingsCoLtdMember |  |  |  |  |
Capital investment |  |  |  |  |  | 800 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_HiTrendInvestmentHoldingsCoLtdMember |  |  |  |  |
Carrying value | 1,081 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_HiTrendInvestmentHoldingsCoLtdMember | 1,102 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_HiTrendInvestmentHoldingsCoLtdMember |  |  |  |  |  |  |  |  |
Additional capital |  |  |  |  |  | 202 us-gaap_AdditionalPaidInCapital / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_HiTrendInvestmentHoldingsCoLtdMember |  |  |  |  |
Dilution of ownership percentage |  |  |  |  |  | 9.00%acts_EquityMethodInvestmentDilutionOfOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_HiTrendInvestmentHoldingsCoLtdMember |  |  |  |  |
Grand Choice [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  | 19.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember |  |  |  | 12.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember |  |  |  | 20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember
Capital investment |  |  | 1,500 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember |  |  |  |  |  |  |  | 600 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember
Carrying value | 819 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember | 819 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember |  |  |  |  |  | 804 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember |  |  |
Additional capital |  |  |  |  |  | 600 us-gaap_AdditionalPaidInCapital / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember |  |  | 10,000 us-gaap_AdditionalPaidInCapital / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember | 7,986 us-gaap_AdditionalPaidInCapital / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember |
Dilution of ownership percentage |  |  |  |  |  |  |  |  | 12.00%acts_EquityMethodInvestmentDilutionOfOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember | 15.00%acts_EquityMethodInvestmentDilutionOfOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_GrandChoiceInvestmentLimitedMember |
OCTT [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  | 19.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_OCTTAsiaLimitedMember |  |  |
Capital investment |  |  |  |  |  |  |  | 13,727 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_OCTTAsiaLimitedMember |  |  |
Carrying value | 13,727 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_OCTTAsiaLimitedMember | 13,727 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_OCTTAsiaLimitedMember |  |  |  |  |  |  |  |  |
Investees One [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment charges |  |  | 803 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_PrivateEntityInvesteesOneMember |  |  |  |  |  |  |  |
Write down of investments |  |  | 1,500 us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_PrivateEntityInvesteesOneMember |  |  |  |  |  |  |  |
Investees Two [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment charges |  |  | 1,740 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = acts_PrivateEntitiesInvesteesTwoMember |  |  |  |  |  |  |  |
Write down of investments |  |  |  |  |  |  |  |  |  |  |

X
- Definition The dilution of percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References No definition available. + Details
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- Definition Represents number of unlisted entities in which entity has investment in equity securities. + References No definition available. + Details
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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.30(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition This element represents the aggregate cost of investments accounted for under the equity method of accounting. + 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 210.5-02.12) -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 12 -Article 5 + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=35687916&loc=d3e32787-111569 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + 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 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 + Details
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- Definition The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8B -URI http://asc.fasb.org/extlink&oid=27724398&loc=SL6284393-111563 + Details
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