Pension and Other Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2011

Pension and Other Postretirement Benefits [Abstract]

Change in benefit obligation

The following tables provide a reconciliation of the changes in the plans’ benefit obligations and fair value of assets as well as a statement of the funded status and balance sheet reporting for these plans.

	Pension Benefits						Other Benefits
Years Ended December 31,	2011			2010			2011			2010
				(In thousands)
Change in benefit obligation:
Benefit obligation, beginning of year	$	(226,805	)	$	(222,948	)	$	(45,917	)	$	(44,232	)
Service cost		(5,863	)		(4,994	)		(92	)		(142	)
Interest cost		(11,687	)		(11,508	)		(2,199	)		(2,305	)
Participant contributions		(125	)		(125	)		(3	)		(12	)
Plan amendments		(356	)		—			—			—
Actuarial loss		(10,855	)		(7,637	)		(4,262	)		(553	)
Other		(7	)		—			—			(138	)
Special termination benefits		—			(20	)		—			—
Foreign currency exchange rate changes		44			4,935			525			(1,304	)
Benefits paid		15,652			15,492			2,830			2,769
Benefit obligation, end of year	$	(240,002	)	$	(226,805	)	$	(49,118	)	$	(45,917	)

Change in Plan Assets

	Pension Benefits						Other Benefits
Years Ended December 31,	2011			2010			2011			2010
				(In thousands)
Change in plan assets:
Fair value of plan assets, beginning of year	$	160,364		$	143,491		$	—		$	—
Actual return on plan assets		7,074			18,628			—			—
Employer contributions		8,598			14,317			2,827			2,619
Plan participant contributions		125			125			3			12
Other		—			—			—			138
Foreign currency exchange rate changes		297			(705	)		—			—
Benefits paid		(15,652	)		(15,492	)		(2,830	)		(2,769	)
Fair value of plan assets, end of year	$	160,806		$	160,364		$	—		$	—
Funded status, end of year	$	(79,196	)	$	(66,441	)	$	(49,118	)	$	(45,917	)

Amounts recognized in the balance sheets

Amounts recongized in the balance sheets:
Prepaid benefit cost	$	9,501		$	6,920		$	—		$	—
Accrued benefit liability (current)		(3,896	)		(4,022	)		(2,682	)		(2,830	)
Accrued benefit liability (noncurrent)		(84,801	)		(69,339	)		(46,436	)		(43,087	)
Net funded status	$	(79,196	)	$	(66,441	)	$	(49,118	)	$	(45,917	)

Components of net periodic benefit costs

The following table provides the components of net periodic benefit costs for the plans.

	Pension Benefits									Other Benefits
Years Ended December 31,	2011			2010			2009			2011			2010			2009
							(In thousands)
Components of net periodic benefit cost:
Service cost	$	5,863		$	4,994		$	4,949		$	92		$	142		$	91
Interest cost		11,687			11,508			12,163			2,199			2,305			2,330
Expected return on plan assets		(11,170	)		(11,436	)		(11,455	)		—			—			—
Amortization of prior service cost		(63	)		(129	)		20			(116	)		(195	)		(203	)
Special termination benefits		—			13			—			—			—			—
Net loss recognition		6,030			4,775			2,293			386			424			248
Net periodic benefit cost	$	12,347		$	9,725		$	7,970		$	2,561		$	2,676		$	2,466

Assumptions used in determining the benefit obligations and the net periodic benefit cost amounts

The following table presents the assumptions used in determining the benefit obligations and the net periodic benefit cost amounts.

	Pension Benefits						Other Benefits
Years Ended December 31,	2011			2010			2011			2010
Weighted average assumptions for benefit obligations at year end:
Discount rate		4.5	%		5.1	%		4.3	%		5.2	%
Salary increase		3.9	%		4.0	%		N/A			N/A
Weighted average assumptions for net periodic cost for the year:
Discount rate		5.1	%		5.4	%		5.2	%		5.3	%
Salary increase		4.0	%		4.0	%		N/A			N/A
Expected return on assets		7.4	%		7.5	%		N/A			N/A
Assumed health care cost trend rates:
Health care cost trend rate assumed for next year		N/A			N/A			8.0	%		8.2	%
Rate that the cost trend rate gradually declines to		N/A			N/A			5.0	%		5.0	%
Year that the rate reaches the rate it is assumed to remain at		N/A			N/A			2020			2017

Effect of one percentage point change in assumed health care cost trend rates

Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plan. A one percentage-point change in the assumed health care cost trend rates would have the following effects on 2011 expense and year-end liabilities.

	1% Increase		1% Decrease
	(In thousands)
Effect on total of service and interest cost components	$	213	$	(179	)
Effect on postretirement benefit obligation	$	4,992	$	(4,168	)

Fair values of the pension plan assets by asset category

The following table presents the fair values of the pension plan assets by asset category.

	Fair Market Value at December 31, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Asset Category:
Equity securities(a)
Large-cap fund	$	59,693	$	—	$	59,693	$	—
Mid-cap fund		10,105		—		10,105		—
Small-cap fund		14,423		—		14,423		—
Debt securities(b)
Government bond fund		23,270		—		23,270		—
Corporate bond fund		19,004		—		19,004		—
Fixed income fund(c)		34,279		—		34,279		—
Cash & equivalents		32		32		—		—
Total	$	160,806	$	32	$	160,774	$	—

(a) This category includes investments in actively managed and indexed investment funds that invest in a diversified pool of equity securities of companies located in the United States, Canada, Western Europe and other developed countries throughout the world. The funds are valued using the net asset value method in which an average of the market prices for the underling investments is used to value the fund.

(b) This category includes investments in investment funds that invest in U.S. treasuries, other national, state and local government bonds, and corporate bonds of highly rated companies from diversified industries. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.

(c) This category includes guaranteed insurance contracts.

Benefits expected to be paid in the subsequent years from our pension and other postretirement as well as Medicare subsidy receipts

The following table reflects the benefits as of December 31, 2011 expected to be paid in each of the next five years and in the aggregate for the five years thereafter from our pension and other postretirement plans as well as Medicare subsidy receipts. Because our other postretirement plans are unfunded, the anticipated benefits with respect to these plans will come from our own assets. Because our pension plans are primarily funded plans, the anticipated benefits with respect to these plans will come primarily from the trusts established for these plans.

	Pension Plans		Other Plans		Medicare Subsidy Receipts
	(In thousands)
2012	$	15,991	$	2,940	$	188
2013		14,891		2,966		181
2014		15,264		2,945		171
2015		16,340		2,977		161
2016		17,438		2,927		150
2017-2021		87,143		13,912		570
Total	$	167,067	$	28,667	$	1,421

Summary of accumulated other comprehensive loss, the changes in these amounts and the expected amortization of these amounts as components of net periodic benefit cost

The amounts in accumulated other comprehensive loss that have not yet been recognized as components of net periodic benefit cost at December 31, 2011, the changes in these amounts during the year ended December 31, 2011, and the expected amortization of these amounts as components of net periodic benefit cost for the year ended December 31, 2012 are as follows.

	Pension Benefits			Other Benefits
	(In thousands)
Components of accumulated other comprehensive loss:
Net actuarial loss	$	68,463		$	11,846
Net prior service credit		(281	)		(488	)
	$	68,182		$	11,358

	Pension Benefits			Other Benefits
	(In thousands)
Changes in accumulated other comprehensive loss:
Net actuarial loss, beginning of year	$	58,915		$	8,117
Amortization cost		(6,030	)		(386	)
Liability loss		10,855			4,262
Asset loss		4,096			—
Currency impact		627			(147	)
Net actuarial loss, end of year	$	68,463		$	11,846
Prior service cost, beginning of year	$	(679	)	$	(608	)
Amortization cost		63			116
Plan amendment		356			—
Currency impact		(21	)		4
Prior service cost, end of year	$	(281	)	$	(488	)

	Pension Benefits			Other Benefits
	(In thousands)
Expected 2012 amortization:
Amortization of prior service cost	$	(54	)	$	(109	)
Amortization of net loss		6,088			810
	$	6,034		$	701