RETIREMENT ARRANGEMENTS (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Compensation Related Costs [Abstract]
Amounts charged to operations with respect to retirement arrangements	$ 0.5	$ 0.5	$ 0.5
Deferred stock units outstanding	403,427	423,296