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ACQUISITIONS (Details) (USD $) |  | 0 Months Ended | 3 Months Ended | 9 Months Ended |  | 9 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 26, 2012 | May 03, 2012 LoopNet [Member] | Sep. 30, 2013 LoopNet [Member] | Sep. 30, 2012 LoopNet [Member] | Sep. 30, 2013 LoopNet [Member] | Sep. 30, 2012 LoopNet [Member] | Apr. 30, 2012 LoopNet [Member] distinct_intangible_asset | Sep. 30, 2013 Acquired Customer Base [Member] | Apr. 30, 2012 Acquired Customer Base [Member] LoopNet [Member] | Sep. 30, 2013 Acquired Database Technology [Member] | Apr. 30, 2012 Acquired Database Technology [Member] LoopNet [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding stock controlled by compnay |  |  |  |  |  |  | 100.00% |  |  |  |
Distinct intangible asset (in intangible asset) |  |  |  |  |  |  | 1 |  |  |  |
Estimated useful life of acquired assets |  |  |  |  |  |  |  | 10 years | 10 years | 5 years | 5 years
Business combination, recognized goodwill acquired |  |  |  |  |  |  | $ 625,174,000 |  |  |  |
Goodwill tax deductible amount |  |  |  |  |  |  | 0 |  |  |  |
Incurred acquisition-related costs |  |  | 0 | 0 | 0 | 5,200,000 |  |  |  |  |
Term of consent order public comment period | 30 days |  |  |  |  |  |  |  |  |  |
Proceeds from sale of Xcelignet |  | 4,200,000 |  |  |  |  |  |  |  |  |
Gain on sale of Xceligent |  | $ 0 |  |  |  |  |  |  |  |  |

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- Definition The amount of goodwill recognized as of the acquisition date. + References No definition available. + Details
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- Definition The number of distinct intangible assets identified. + References No definition available. + Details
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- Definition Term of Consent Order Public Comment Period + References No definition available. + Details
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 + Details
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- Definition The difference between the book value and the sale price of other nonspecific investments. This element is used when other, more specific, elements are not appropriate. This element refers to the gain (loss) included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The cash inflow from the sale of investment projects held by an entity in hopes of getting a future return or interest from it. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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