DISCONTINUED OPERATIONS (Details-Disposal Groups) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Jun. 06, 2012
DISCONTINUED OPERATIONS
Cash and cash equivalents	$ 159,611	$ 92,967	$ 159,611	$ 92,967	$ 206,975	$ 86,212
Revenue and net income (loss) of discontinued operations
Revenue	0	2	1	3
Loss before income taxes	(1,769)	(1,788)	(3,619)	(2,026)
Income tax benefit	619	71	1,266	83
Loss from discontinued operations	(1,150)	$ (1,717)	(2,353)	$ (1,943)
Assets and liabilities of facilities reported as discontinued operations
Current assets	0		0		110
Non-current assets of discontinued operations	4,142		4,142		4,142
Current liabilities	(14,057)		(14,057)		(13,401)
Non-current liabilities	$ (27)		$ (27)		$ (26)
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DISCONTINUED OPERATIONS
Asset Purchase Agreement Proceeds From Sale							$ 55,900