PENSIONS AND OTHER POST-RETIREMENT BENEFITS (Tables)

9 Months Ended

Sep. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Summary of the costs of the Company's employee pension and post retirement plans

	Pension Benefits						Other Benefits
	Nine months ended						Nine months ended
	September 30,			September 30,			September 30,			September 30,
	2014			2013			2014			2013
Service cost	$	5,202		$	6,006		$	18		$	27
Interest cost	10,005			9,048			273			243
Expected return on plan assets	(11,808		)	(10,434		)	—			—
Amortization of prior service cost	9			12			(1,683		)	(2,532		)
Recognized actuarial loss	1,506			6,468			462			576
Net periodic benefit cost	$	4,914		$	11,100		$	(930	)	$	(1,686	)

The following tables summarize the costs of the Company’s employee pension and other post retirement benefit plans for the periods indicated (in thousands):

	Pension Benefits						Other Benefits
	Three months ended						Three months ended
	September 30,			September 30,			September 30,			September 30,
	2014			2013			2014			2013
Service cost	$	1,734		$	2,002		$	6		$	9
Interest cost	3,335			3,016			91			81
Expected return on plan assets	(3,936		)	(3,478		)	—			—
Amortization of prior service cost	3			4			(561		)	(844		)
Recognized actuarial loss	502			2,156			154			192
Net periodic benefit cost	$	1,638		$	3,700		$	(310	)	$	(562	)