OTHER INCOME, NET Components of Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Income and Expenses [Abstract]
Interest and investment income	$ 111	$ 24	$ 371	$ 63
Income tax benefit (expense)	(210)	(601)	32	(643)
Other non-operating income	0	0	0	126
Total other income (expense), net	$ (99)	$ (577)	$ 403	$ (454)