CONTINGENCIES (Details) $ in Thousands		1 Months Ended		6 Months Ended	12 Months Ended
	Sep. 08, 2010 patent	Feb. 29, 2016	Dec. 31, 2013 claim	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($) loan	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2014 USD ($)	Mar. 12, 2014 patent
Contingencies
Accrued litigation liabilities						$ 346	$ 736
Loss Contingency, Damages Sought			61.0
Loss Contingency, Number of Defendants		149
Lehman Brothers Holdings, Inc. Demand Letter [Member]
Contingencies
Loss Contingencies, Number of Loans Sold with Losses | loan					64
Settled Litigation [Member] | Lending Tree v. Zillow, Inc.
Contingencies
Number of patents infringed | patent	1
Number of patents found not infringed upon | patent									2
Litigation Settlement, Amount Awarded to Other Party				$ 1,100	$ 2,300
Pending litigation or appeal | Residential Funding Co. v Home Loan Center [Member]
Contingencies
Accrued litigation liabilities						3,000
Number of Loan Originators			80
Loss Contingency, Pending Claims, Number | claim			2
Pending litigation or appeal | Lehman Brothers Holdings, Inc. Demand Letter [Member]
Contingencies
Accrued litigation liabilities						1,000
Discontinued Operations, Disposed of by Sale [Member]
Contingencies
Accrued litigation liabilities						$ 4,000	$ 4,000
Maximum [Member] | Settled Litigation [Member] | Lending Tree v. Zillow, Inc.
Contingencies
Range of possible loss, minimum								$ 9,700