EQUITY Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Accumulated other comprehensive income/(loss), net of tax	$ (6,178)	$ (1,760)	$ (6,178)	$ (1,760)	$ (8,642)	$ (1,958)
Other comprehensive income before reclassifications			2,466	174
Amounts reclassified from accumulated other comprehensive income, net of tax			(2)	24
Other comprehensive income/(loss), net of tax	(306)	(24)	2,464	198
Foreign Currency Translation Adjustment
Accumulated other comprehensive income/(loss), net of tax	(6,161)	(1,760)	(6,161)	(1,760)	(8,475)	(1,839)
Other comprehensive income before reclassifications			2,314	79
Amounts reclassified from accumulated other comprehensive income, net of tax			0	0
Other comprehensive income/(loss), net of tax			2,314	79
Unrealized Gain/(Loss) on Marketable Securities, Net of Tax
Accumulated other comprehensive income/(loss), net of tax	$ (17)	$ 0	(17)	0	$ (167)	$ (119)
Other comprehensive income before reclassifications			152	95
Amounts reclassified from accumulated other comprehensive income, net of tax			(2)	24
Other comprehensive income/(loss), net of tax			$ 150	$ 119