PENSION AND POSTRETIREMENT PLANS (Tables)

9 Months Ended

Sep. 30, 2015

Pension and Other Postretirement Benefit Expense [Abstract]

Summary of the components of net periodic pension benefit costs

A summary of the components of net periodic pension and postretirement benefit costs for the three and nine months ended September 30, 2015 and 2014 is presented below (in thousands):

	Pension Benefits						Postretirement Benefits
	Three Months Ended   September 30,						Three Months Ended   September 30,
	2015			2014			2015			2014
Service cost	$	484		$	352		$	3		$	3
Interest cost	1,673			2,107			19			22
Expected return on plan assets	(2,395		)	(2,477		)	—			—
Amortization of prior service credit	(79		)	(99		)	—			—
Amortization of transition asset	(19		)	(69		)	—			—
Amortization of actuarial loss (gain)	772			431			(13		)	(14		)
Net periodic cost	$	436		$	245		$	9		$	11
	Pension Benefits						Postretirement Benefits
	Nine Months Ended   September 30,						Nine Months Ended   September 30,
	2015			2014			2015			2014
Service cost	$	1,475		$	1,078		$	9		$	9
Interest cost	5,024			6,351			56			66
Expected return on plan assets	(7,208		)	(7,473		)	—			—
Amortization of prior service credit	(241		)	(303		)	—			—
Amortization of transition asset	(61		)	(211		)	—			—
Amortization of actuarial loss (gain)	2,334			1,302			(38		)	(42		)
Net periodic cost	$	1,323		$	744		$	27		$	33