EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2015

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   March 31,
Pension Benefits	2015			2014
Components of net periodic benefit cost:
Service cost	$	5,790		$	4,291
Interest cost	709			570
Expected return on plan assets	(829		)	(524		)
Amortization of prior service costs	13			3
Amortization of actuarial loss	311			222
Net periodic benefit cost	$	5,994		$	4,562

	Three Months Ended   March 31,
Post Retirement Medical Plan	2015		2014
Components of net periodic benefit cost:
Service cost	$	244	$	178
Interest cost	134		93
Amortization of prior service costs	76		(20		)
Amortization of actuarial loss	—		(5		)
Net periodic benefit cost	$	454	$	246