EMPLOYEE BENEFIT PLANS (Tables)

9 Months Ended

Sep. 30, 2016

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of net periodic benefit cost

The components of net periodic benefit cost related to the Company’s defined benefit plans consisted of the following:

	Three Months Ended   September 30,						Nine Months Ended   September 30,
Pension Benefits	2016			2015			2016			2015
Components of net periodic benefit cost:
Service cost	$	10,064		$	5,790		$	24,743		$	17,369
Interest cost	772			710			2,323			2,126
Expected return on plan assets	(1,234		)	(830		)	(3,447		)	(2,489		)
Amortization of prior service costs	13			13			39			39
Amortization of loss	328			311			716			933
Net periodic benefit cost	$	9,943		$	5,994		$	24,374		$	17,978

	Three Months Ended   September 30,				Nine Months Ended   September 30,
Post Retirement Medical Plan	2016		2015		2016		2015
Components of net periodic benefit cost:
Service cost	$	304	$	243	$	743	$	731
Interest cost	131		134		398		403
Amortization of prior service costs	161		76		379		228
Amortization of loss	—		—		—		—
Net periodic benefit cost	$	596	$	453	$	1,520	$	1,362