DISCONTINUED OPERATIONS (Details-Disposal Groups) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Jun. 06, 2012
DISCONTINUED OPERATIONS
Cash and cash equivalents	$ 346,470		$ 368,550
Revenue and net income (loss) of discontinued operations
Revenue	0	$ (750)
Loss before income taxes	(5,485)	(1,435)
Income tax benefit	1,152	503
Loss from discontinued operations	(4,333)	$ (932)
Assets and liabilities of facilities reported as discontinued operations
Non-current assets of discontinued operations	2,428		2,428
Current liabilities	$ (17,449)		$ (14,507)
Lending Tree Loans | Discover
DISCONTINUED OPERATIONS
Asset purchase agreement proceeds from sale				$ 55,900