RETIREMENT AND DEFERRED COMPENSATION PLANS (Tables)

6 Months Ended

Jun. 30, 2018

RETIREMENT AND DEFERRED COMPENSATION PLANS

Components of net periodic benefit cost

	Domestic Plans				Foreign Plans
Three Months Ended June 30,	2018		2017		2018		2017
Service cost	$	2,844	$	2,433	$	1,491	$	1,382
Interest cost		1,706		1,757		457		438
Expected return on plan assets		(2,792)		(2,475)		(658)		(586)
Amortization of net loss		1,210		801		433		460
Amortization of prior service cost		—		—		125		98
Net periodic benefit cost	$	2,968	$	2,516	$	1,848	$	1,792

	Domestic Plans				Foreign Plans
Six Months Ended June 30,	2018		2017		2018		2017
Service cost	$	5,693	$	4,853	$	3,022	$	2,719
Interest cost		3,426		3,505		929		862
Expected return on plan assets		(5,606)		(4,939)		(1,337)		(1,154)
Amortization of net loss		2,428		1,602		879		907
Amortization of prior service cost		—		—		254		192
Net periodic benefit cost	$	5,941	$	5,021	$	3,747	$	3,526