RETIREMENT AND DEFERRED COMPENSATION PLANS (Tables)

3 Months Ended

Mar. 31, 2018

RETIREMENT AND DEFERRED COMPENSATION PLANS

Components of net periodic benefit cost

	Domestic Plans				Foreign Plans
Three Months Ended March 31,	2018		2017		2018		2017
Service cost	$	2,849	$	2,420	$	1,531	$	1,337
Interest cost		1,720		1,748		472		424
Expected return on plan assets		(2,814)		(2,464)		(679)		(568)
Amortization of net loss		1,218		801		446		447
Amortization of prior service cost		—		—		129		94
Net periodic benefit cost	$	2,973	$	2,505	$	1,899	$	1,734