P. EMPLOYEE BENEFIT PLANS - NARRATIVE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension expense	$ 0.9	$ 0.8	$ 0.6
Company contributions for 401(k)	0.6	0.6	0.4
Global [Member]
Pension expense	$ 0.8	$ 0.6	$ 0.3