Pension and Postretirement Plans (Tables)

12 Months Ended

Dec. 31, 2012

Defined Benefit Plans [Member]

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

	Pension Plans				SERP
(in thousands)	2012		2011		2012		2011
Noncurrent asset	$	604,823	$	537,262	$	―	$	―
Current liability		―		―		(4,368)		(4,002)
Noncurrent liability		―		―		(99,694)		(88,861)
Recognized Asset (Liability)	$	604,823	$	537,262	$	(104,062)	$	(92,863)

Schedule of Expected Benefit Payments [Table Text Block]

(in thousands)	Pension Plans		SERP
2013	$	75,081	$	4,454
2014	$	74,887	$	4,768
2015	$	75,207	$	4,846
2016	$	76,285	$	5,360
2017	$	78,657	$	5,511
2018–2022	$	429,337	$	30,867

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

	Pension Plans				SERP
(in thousands)	2012		2011		2012		2011
Unrecognized actuarial (gain) loss	$	(193,469)	$	(105,051)	$	33,725	$	26,385
Unrecognized prior service cost		15,931		19,626		191		245
Gross Amount		(177,538)		(85,425)		33,916		26,630
Deferred tax liability (asset)		71,015		34,170		(13,566)		(10,652)
Net Amount	$	(106,523)	$	(51,255)	$	20,350	$	15,978

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

		2013
(in thousands)	Pension Plans			SERP
Actuarial loss recognition		$	8,588	$	2,569
Prior service cost recognition		$	3,635	$	54

Defined Benefit Plans [Member] | Periodic Cost [Member]

Schedule of Assumptions Used [Table Text Block]

	Pension Plans			SERP
	2012	2011	2010	2012	2011	2010
Discount rate	4.7%	5.6%	6.0%	4.7%	5.6%	6.0%
Expected return on plan assets	6.5%	6.5%	6.5%	―	―	―
Rate of compensation increase	4.0%	4.0%	4.0%	4.0%	4.0%	4.0%

Defined Benefit Plans [Member] | Benefit Obligation [Member]

Schedule of Assumptions Used [Table Text Block]

	Pension Plans		SERP
	2012	2011	2012	2011
Discount rate	4.0%	4.7%	4.0%	4.7%
Rate of compensation increase	4.0%	4.0%	4.0%	4.0%

Pension Plans [Member]

Schedule of Net Funded Status [Table Text Block]

	Pension Plans
(in thousands)	2012		2011
Change in Benefit Obligation
Benefit obligation at beginning of year	$	1,279,315	$	1,113,205
Service cost		40,344		27,619
Interest cost		59,124		60,033
Amendments		8,508		2,776
Actuarial loss		144,286		140,126
Benefits paid and other		(65,255)		(64,444)
Benefit Obligation at End of Year	$	1,466,322	$	1,279,315
Change in Plan Assets
Fair value of assets at beginning of year	$	1,816,577	$	1,651,958
Actual return on plan assets		319,823		229,063
Benefits paid and other		(65,255)		(64,444)
Fair Value of Assets at End of Year	$	2,071,145	$	1,816,577
Funded Status	$	604,823	$	537,262

Summary of Net (Benefit) Costs [Table Text Block]

		Pension Plans
(in thousands)		2012		2011		2010
Service cost		$	40,344	$	27,619	$	26,976
Interest cost			59,124		60,033		60,329
Expected return on assets			(96,132)		(95,983)		(95,340)
Amortization of transition asset			―		―		(29)
Amortization of prior service cost			3,695		3,605		4,201
Recognized actuarial loss			9,013		―		―
Net Periodic Cost (Benefit) for the Year			16,044		(4,726)		(3,863)
Early retirement programs expense			8,508		634		―
Special termination benefits			―		―		5,295
Recognition of prior service cost			―		―		2,369
Total Cost (Benefit) for the Year		$	24,552	$	(4,092)	$	3,801
Other Changes in Plan Assets and Benefit Obligations
	Recognized in Other Comprehensive Income
Current year actuarial (gain) loss		$	(79,405)	$	7,046	$	(126,568)
Amortization of transition asset			―		―		29
Amortization of prior service cost			(3,695)		(1,463)		(6,570)
Recognized net actuarial loss			(9,013)		―		―
Total Recognized in Other Comprehensive Income (Before Tax Effects)		$	(92,113)	$	5,583	$	(133,109)
Total Recognized in Total Cost (Benefit) and Other
	Comprehensive Income (Before Tax Effects)	$	(67,561)	$	1,491	$	(129,308)

Allocation of the Assets of the Company's Pension Plans [Table Text Block]

	December 31,
	2012			2011
U.S. equities		64	%		69	%
U.S. fixed income		13	%		10	%
International equities		23	%		21	%
		100	%		100	%

Schedule of Fair Value, Assets Measured on Recurring Basis [Table Text Block]

(in thousands)		Level 1		Level 2		Total
At December 31, 2012
Cash equivalents and other short-term investments		$	195,389	$	62,922	$	258,311
Equity securities
	U.S. equities		1,315,378		―		1,315,378
	International equities		482,431		―		482,431
Fixed-income securities
	Corporate debt securities		―		6,054		6,054
	Other fixed income		2,501		313		2,814
Total Investments		$	1,995,699	$	69,289	$	2,064,988
Receivables							6,157
Total						$	2,071,145

At December 31, 2011
Cash equivalents and other short-term investments		$	120,101	$	43,166	$	163,267
Equity securities
	U.S. equities		1,249,079		―		1,249,079
	International equities		381,924		―		381,924
Fixed-income securities
	U.S. Federal agency mortgage-backed securities		―		1,071		1,071
	Corporate debt securities		―		9,203		9,203
	Other fixed income		2,531		8,121		10,652
Total investments		$	1,753,635	$	61,561	$	1,815,196
Receivables							1,381
Total						$	1,816,577

Supplemental Executive Retirement Plan (SERP) [Member]

Schedule of Net Funded Status [Table Text Block]

	SERP
(in thousands)	2012		2011
Change in Benefit Obligation
Benefit obligation at beginning of year	$	92,863	$	79,403
Service cost		1,467		1,655
Interest cost		4,241		4,342
Amendments		―		369
Actuarial loss		8,428		9,059
Benefits paid and other		(2,937)		(1,965)
Benefit Obligation at End of Year	$	104,062	$	92,863
Change in Plan Assets
Fair value of assets at beginning of year	$	―	$	―
Employer contributions and other		3,681		3,114
Benefits paid		(3,681)		(3,114)
Fair Value of Assets at End of Year	$	―	$	―
Funded Status	$	(104,062)	$	(92,863)

Summary of Net (Benefit) Costs [Table Text Block]

		SERP
(in thousands)		2012		2011		2010
Service cost		$	1,467	$	1,655	$	1,381
Interest cost			4,241		4,342		4,244
Plan amendment			―		369		―
Amortization of prior service cost			54		260		406
Recognized actuarial loss			1,833		1,411		1,068
Total Cost for the Year		$	7,595	$	8,037	$	7,099
Other Changes in Benefit Obligations Recognized in
	Other Comprehensive Income
Current year actuarial loss		$	8,428	$	9,059	$	2,656
Amortization of prior service cost			(54)		(260)		(406)
Recognized net actuarial loss			(1,833)		(1,411)		(877)
Other adjustments			745		―		―
Total Recognized in Other Comprehensive Income (Before Tax Effects)		$	7,286	$	7,388	$	1,373
Total Recognized in Total Cost and Other Comprehensive
	Income (Before Tax Effects)	$	14,881	$	15,425	$	8,472

Other Postretirement Plans [Member]

Schedule of Net Funded Status [Table Text Block]

	Postretirement Plans
(in thousands)	2012		2011
Change in Benefit Obligation
Benefit obligation at beginning of year	$	72,412	$	68,818
Service cost		3,113		2,872
Interest cost		2,735		3,063
Actuarial gain		(11,493)		(55)
Curtailment loss		438		―
Benefits paid, net of Medicare subsidy		(3,337)		(2,286)
Benefit Obligation at End of Year	$	63,868	$	72,412
Change in Plan Assets
Fair value of assets at beginning of year	$	―	$	―
Employer contributions		3,337		2,286
Benefits paid, net of Medicare subsidy		(3,337)		(2,286)
Fair Value of Assets at End of Year	$	―	$	―
Funded Status	$	(63,868)	$	(72,412)

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

	Postretirement Plans
(in thousands)	2012		2011
Current liability	$	(3,919)	$	(4,548)
Noncurrent liability		(59,949)		(67,864)
Recognized Liability	$	(63,868)	$	(72,412)

Schedule of Expected Benefit Payments [Table Text Block]

	Postretirement
(in thousands)	Plans
2013		$	3,919
2014		$	4,081
2015		$	4,288
2016		$	4,521
2017		$	4,623
2018–2022		$	25,998

Summary of Net (Benefit) Costs [Table Text Block]

		Postretirement Plans
(in thousands)		2012		2011		2010
Service cost		$	3,113	$	2,872	$	3,275
Interest cost			2,735		3,063		3,934
Amortization of prior service credit			(5,608)		(5,650)		(5,026)
Recognized actuarial gain			(1,478)		(1,921)		(2,032)
Net Periodic (Benefit) Cost			(1,238)		(1,636)		151
Curtailment loss (gain)			438		―		(8,583)
Total Benefit for the Year		$	(800)	$	(1,636)	$	(8,432)
Other Changes in Benefit Obligations Recognized in Other Comprehensive Income
Current year actuarial gain		$	(11,493)	$	(55)	$	(3,073)
Current year prior service credit			―		―		(6,336)
Amortization of prior service credit			5,608		5,650		5,026
Recognized actuarial gain			1,478		1,921		2,032
Curtailment loss			―		―		4,953
Total Recognized in Other Comprehensive Income (Before Tax Effects)		$	(4,407)	$	7,516	$	2,602
Total Recognized in (Benefit) Cost and Other
	Comprehensive Income (Before Tax Effect)	$	(5,207)	$	5,880	$	(5,830)

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

(in thousands)	2012		2011
Unrecognized actuarial gain	$	(25,525)	$	(15,510)
Unrecognized prior service credit		(26,128)		(31,736)
Gross Amount		(51,653)		(47,246)
Deferred tax liability		20,661		18,898
Net Amount	$	(30,992)	$	(28,348)

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

(in thousands)	2013
Actuarial gain recognition	$	(2,240)
Prior service credit recognition	$	(5,547)

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

	1%		1%
(in thousands)	Increase		Decrease
Benefit obligation at end of year	$	5,354	$	(4,740)
Service cost plus interest cost	$	657	$	(560)