Pension and OPEB - Periodic Cost (Tables)

9 Months Ended

Sep. 30, 2013

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

Components of Net Periodic Costs

Components of net periodic costs (benefits) for the three and nine months ended September 30 are as follows:

	Pension Benefits												Other Post-Employment Benefits
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
	September 30,						September 30,						September 30,						September 30,
	2013			2012			2013			2012			2013			2012			2013			2012
Service cost	$	4,897		$	5,527		$	16,184		$	15,530		$	4,849		$	4,525		$	14,547		$	14,291
Interest cost	9,497			9,396			27,249			28,190			29,619			33,687			88,856			102,008
Expected return on plan assets	(13,336		)	(11,538		)	(38,191		)	(34,617		)	—			—			—			—
Amortization of prior service credits	(408		)	(408		)	(1,223		)	(1,223		)	(7,804		)	(13,409		)	(23,411		)	(38,418		)
Recognized net actuarial loss	8,042			11,959			30,764			35,876			17,595			20,255			52,784			60,620
Settlement loss	6,296			—			38,498			—			—			—			—			—
Net periodic benefit cost	$	14,988		$	14,936		$	73,281		$	43,756		$	44,259		$	45,058		$	132,776		$	138,501