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SIGNIFICANT ACCOUNTING POLICIES (Details - PP&E, Goodwill, Int. & Advertising) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Property and Equipment |  |  |
Impairment of long-lived assets | $ 805,000 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | $ 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | $ 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Goodwill and Indefinite-Lived Intangible Assets |  |  |
Goodwill and indefinite-lived intangible asset impairments | 0 us-gaap_GoodwillAndIntangibleAssetImpairment |  | 1,400,000 us-gaap_GoodwillAndIntangibleAssetImpairment
Advertising |  |  |
Advertising Expense | 102,200,000 us-gaap_AdvertisingExpense | 80,700,000 us-gaap_AdvertisingExpense | 40,800,000 us-gaap_AdvertisingExpense
Computer equipment and capitalized software |  |  |
Property and Equipment |  |  |
Impairment of long-lived assets | $ 400,000 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse / us-gaap_PropertyPlantAndEquipmentByTypeAxis = tree_ComputerEquipmentAndCapitalizedSoftwareMember |  |
Computer equipment and capitalized software | Minimum |  |  |
Property and Equipment |  |  |
Depreciation period | 1 year |  |
Computer equipment and capitalized software | Maximum |  |  |
Property and Equipment |  |  |
Depreciation period | 5 years |  |
Furniture and other equipment | Minimum |  |  |
Property and Equipment |  |  |
Depreciation period | 3 years |  |
Furniture and other equipment | Maximum |  |  |
Property and Equipment |  |  |
Depreciation period | 7 years |  |
Software development | Minimum |  |  |
Property and Equipment |  |  |
Depreciation period | 1 year |  |
Software development | Maximum |  |  |
Property and Equipment |  |  |
Depreciation period | 3 years |  |

X
- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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X
- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28367520&loc=d3e92212-112881 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Impairment -URI http://asc.fasb.org/extlink&oid=6515133 + Details
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