PENSION, PROFIT SHARING, AND OTHER EMPLOYEE BENEFIT PLANS (Plan's funded status) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected obligation at January 1	$ 40,783	$ 39,416
Interest cost	1,640	1,657	$ 1,629
Actuarial loss (gain)	(32)	251
Benefit payments	(1,945)	(1,248)
Increase (decrease) related to discount rate change	2,995	707
Projected obligation at December 31	43,441	40,783	39,416
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at January 1	36,020	30,683
Actual return on plan assets	4,971	755
Contribution	2,200	5,830
Benefit payments	(1,945)	(1,248)
Fair value of plan assets at December 31	41,246	36,020	30,683
Funded status at December 31	(2,195)	(4,763)
Accumulated benefit obligation at December 31	43,441	40,783
Unrecognized net actuarial loss	12,487	13,689	(13,038)
Net periodic pension cost not yet recognized	$ 12,487	$ 13,689	$ (13,038)