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Income Taxes Valuation allowance (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013
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Income Tax Disclosure [Abstract] |
Capital loss carryforwards, valuation allowance | $ 1,562 actg_Capitallosscarryforwardsvaluationallowance
Operating Loss Carryforwards, Valuation Allowance | 1,281 us-gaap_OperatingLossCarryforwardsValuationAllowance
Foreign tax credits, valuation allowance | 4,405 actg_Foreigntaxcreditsvaluationallowance
Unrealized losses on short-term investments and other deferred tax assets, valuation allowance | 337 actg_Unrealizedlossesonshortterminvestmentsandotherdeferredtaxassetsvaluationallowance
Valuation Allowances and Reserves, Balance | $ 7,585 us-gaap_ValuationAllowancesAndReservesBalance

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- Definition Capital loss carryforwards, valuation allowance + References No definition available. + Details
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- Definition Foreign tax credits, valuation allowance + References No definition available. + Details
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- Definition Unrealized losses on short-term investments and other deferred tax assets, valuation allowance + References No definition available. + Details
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- Details
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- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 30 -Paragraph 5 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907311&loc=d3e30536-109315 + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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