Pension And Other Postretirement Benefit Plans (Tables)

3 Months Ended

Jun. 30, 2014

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

Components of Company's Net Periodic Benefit Cost

The components of the Company’s net periodic benefit cost were as follows:

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended June 30,						Three Months Ended June 30,
(in thousands of dollars)	2014			2013			2014			2013
Service cost	$	1,334		$	1,195		$	114		$	138
Interest cost	2,669			2,857			484			532
Expected return on plan assets	(3,692		)	(3,542		)	(26		)	(30		)
Net amortization and deferral	780			2,447			(133		)	(17		)
Net periodic benefit cost	$	1,091		$	2,957		$	439		$	623