EMPLOYEE BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2014

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   June 30,						Six Months Ended   June 30,
Pension Benefits	2014			2013			2014			2013
Components of net periodic benefit cost:
Service cost	$	4,851		$	3,699		$	9,142		$	7,397
Interest cost	601			248			1,171			496
Expected return on plan assets	(539		)	(138		)	(1,063		)	(276		)
Amortization of prior service costs	10			3			12			5
Amortization of loss	258			105			480			210
Net periodic benefit cost	$	5,181		$	3,917		$	9,742		$	7,832

	Three Months Ended   June 30,				Six Months Ended   June 30,
Post Retirement Medical Plan	2014		2013		2014			2013
Components of net periodic benefit cost:
Service cost	$	300	$	181	$	478		$	363
Interest cost	135		84		228			167
Amortization of prior service costs	75		—		55			—
Amortization of gain	1		—		(4		)	—
Net periodic benefit cost	$	511	$	265	$	757		$	530