v2.4.1.9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 830,754 us-gaap_Revenues | $ 782,231 us-gaap_Revenues | $ 756,315 us-gaap_Revenues | $ 740,247 us-gaap_Revenues | $ 724,455 us-gaap_Revenues | $ 756,872 us-gaap_Revenues | $ 799,411 us-gaap_Revenues | $ 742,249 us-gaap_Revenues | $ 3,109,547 us-gaap_Revenues | $ 3,022,987 us-gaap_Revenues | $ 2,800,933 us-gaap_Revenues
Accounts receivable | 236,086 us-gaap_AccountsReceivableNetCurrent |  |  |  | 207,408 us-gaap_AccountsReceivableNetCurrent |  |  |  | 236,086 us-gaap_AccountsReceivableNetCurrent | 207,408 us-gaap_AccountsReceivableNetCurrent |
Google Inc. |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 1,400,000 us-gaap_Revenues / us-gaap_MajorCustomersAxis = iaci_GoogleIncMember | 1,500,000 us-gaap_Revenues / us-gaap_MajorCustomersAxis = iaci_GoogleIncMember | 1,400,000 us-gaap_Revenues / us-gaap_MajorCustomersAxis = iaci_GoogleIncMember
Accounts receivable | $ 118,700 us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = iaci_GoogleIncMember |  |  |  | $ 112,300 us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = iaci_GoogleIncMember |  |  |  | $ 118,700 us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = iaci_GoogleIncMember | $ 112,300 us-gaap_AccountsReceivableNetCurrent / us-gaap_MajorCustomersAxis = iaci_GoogleIncMember |

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + 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 210.5-02.3-4) -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 3 -Subparagraph a(1) -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |