EMPLOYEE BENEFIT PLANS

9 Months Ended

Sep. 30, 2015

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

EMPLOYEE BENEFIT PLANS

K. EMPLOYEE BENEFIT PLANS

The following tables set forth the components of net periodic benefit cost for our pension and postretirement benefit plans for our continuing operations for the periods indicated:

	Pension Benefits
	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
	(Thousands of dollars)
Components of net periodic benefit cost
Service cost	$	1,887		$	1,784		$	5,661		$	5,429
Interest cost	4,546			4,488			13,638			13,744
Expected return on assets	(5,213		)	(4,775		)	(15,639		)	(14,644		)
Amortization of unrecognized prior service cost	23			48			69			144
Amortization of net loss	3,987			3,798			11,961			11,309
Other	—			16			—			136
Net periodic benefit cost	$	5,230		$	5,359		$	15,690		$	16,118

	Postretirement Benefits
	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
	(Thousands of dollars)
Components of net periodic benefit cost
Service cost	$	186		$	175		$	558		$	533
Interest cost	587			603			1,760			1,825
Expected return on assets	(564		)	(513		)	(1,692		)	(1,623		)
Amortization of unrecognized prior service cost	(415		)	(416		)	(1,245		)	(1,246		)
Amortization of net loss	435			211			1,307			627
Other	—			—			—			(2		)
Net periodic benefit cost	$	229		$	60		$	688		$	114