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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	$ 805,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse	$ 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse	$ 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Goodwill and Indefinite-Lived Intangible Assets
Goodwill and indefinite-lived intangible asset impairments	0us-gaap_GoodwillAndIntangibleAssetImpairment		1,400,000us-gaap_GoodwillAndIntangibleAssetImpairment
Advertising
Advertising Expense	102,200,000us-gaap_AdvertisingExpense	80,700,000us-gaap_AdvertisingExpense	40,800,000us-gaap_AdvertisingExpense
Computer equipment and capitalized software
Property and Equipment
Impairment of long-lived assets	$ 400,000us-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

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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.

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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



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-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Impairment

-URI http://asc.fasb.org/extlink&oid=6515133

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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