Pension and OPEB - Periodic Cost (Tables)

3 Months Ended

Mar. 31, 2013

COMPONENTS OF PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS NET PERIODIC BENEFIT COSTS: [Abstract]

Components of Net Periodic Costs

Components of net periodic costs for the three months ended March 31 are as follows:

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended						Three Months Ended
	March 31,						March 31,
	2013			2012			2013			2012
Service cost	$	5,706		$	5,153		$	4,849		$	5,200
Interest cost	8,843			9,378			29,619			35,527
Expected return on plan assets	(12,144		)	(11,627		)	—			—
Amortization of prior service cost (credits)	(408		)	(408		)	(7,804		)	(11,599		)
Recognized net actuarial loss	12,175			12,263			17,595			20,345
Settlement loss	27,115			—			—			—
Net periodic benefit cost	$	41,287		$	14,759		$	44,259		$	49,473