EMPLOYEE BENEFIT PLANS

3 Months Ended

Mar. 31, 2016

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

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS

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

	Three Months Ended   March 31,
Pension Benefits	2016			2015
Components of net periodic benefit cost:
Service cost	$	7,340		$	5,790
Interest cost	776			709
Expected return on plan assets	(1,106		)	(829		)
Amortization of prior service costs	13			13
Amortization of loss	194			311
Net periodic benefit cost	$	7,217		$	5,994

	Three Months Ended   March 31,
Post Retirement Medical Plan	2016		2015
Components of net periodic benefit cost:
Service cost	$	220	$	244
Interest cost	134		134
Amortization of prior service costs	109		76
Amortization of loss (gain)	—		—
Net periodic benefit cost	$	463	$	454