RETIREMENT BENEFITS AND ASSETS HELD IN TRUST (Tables)

9 Months Ended

Sep. 30, 2013

Retirement Plan Benefits

Defined Benefit Plan Disclosure

Schedule of Net Defined Benefit Cost Components

Net pension cost includes the following components:

	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands)	2013			2012			2013			2012
Service cost	$	1,315		$	1,040		$	3,946		$	3,120
Interest cost	698			647			2,094			1,942
Expected return on plan assets	(717		)	(569		)	(2,151		)	(1,708		)
Amortization of prior service cost	(10		)	(11		)	(31		)	(32		)
Amortization of unrecognized loss	679			868			2,036			2,603
Net pension cost	$	1,965		$	1,975		$	5,894		$	5,925

Other Postretirement Benefits

Defined Benefit Plan Disclosure

Schedule of Net Defined Benefit Cost Components

Net postretirement cost includes the following components:

	Three months ended						Nine months ended
	September 30,						September 30,
(in thousands)	2013			2012			2013			2012
Service cost	$	1,443		$	1,358		$	4,330		$	4,075
Interest cost	390			388			1,171			1,164
Expected return on plan assets	(353		)	(254		)	(1,061		)	(762		)
Amortization of prior service cost	—			31			—			93
Amortization of unrecognized loss	55			134			165			401
Net postretirement cost	$	1,535		$	1,657		$	4,605		$	4,971