CONTINGENCIES (Details)				1 Months Ended			6 Months Ended	12 Months Ended
	Feb. 19, 2016 regulator	Oct. 14, 2011 regulator	Sep. 08, 2010 patent	Jul. 31, 2015 USD ($)	Jul. 31, 2014 USD ($)	Dec. 31, 2013	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Mar. 12, 2014 patent
Contingencies
Accrued litigation liabilities								$ 2,786,000	$ 636,000
Massachusetts Division of Banks
Contingencies
Accrued litigation liabilities									500,000
Range of possible loss, minimum									500,000.0
Range of possible loss, maximum									6,500,000.0
Number of Joining Regulators | regulator		34
Massachusetts Division of Banks | Subsequent event
Contingencies
Number of Joining Regulators | regulator	0
Pending litigation or appeal | Lending Tree v. Zillow, Inc.
Contingencies
Number of patents infringed | patent			1
Number of patents found not infringed upon | patent										2
Litigation settlement							$ 1,100,000	2,300,000
Range of possible loss, maximum								9,700,000
Pending litigation or appeal | Lijkel Dijkstra v. Harry Carenbauer, Home Loan Center, Inc
Contingencies
Accrued litigation liabilities									3,200,000
Litigation settlement				$ 389,500	$ 2,800,000
Pending litigation or appeal | Residential Funding Co. v Home Loan Center [Member]
Contingencies
Number of Loan Originators						80
Pending litigation or appeal | Lehman Brothers Holdings, Inc. Demand Letter [Member]
Contingencies
Accrued litigation liabilities									500,000
Discontinued Operations, Disposed of by Sale [Member]
Contingencies
Accrued litigation liabilities								$ 2,900,000	$ 3,600,000