Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures

The following tables set forth the change in benefit obligation, change in plan assets, funded status, consolidated balance sheet presentation and net periodic benefit cost for the Company’s defined benefit pension plans and other benefits at and for the years ended December 31:

	Pension Benefits						Other Benefits
	2011			2010			2011			2010
Change in benefit obligation
Benefit obligation at beginning of year	$	552,760		$	490,544		$	16,885		$	16,585
Service cost	10,854			9,994			—			—
Interest cost	31,491			30,723			930			993
Actuarial loss	63,079			41,848			1,277			1,311
Plan participant contributions	—			—			114			159
Medicare retiree drug subsidy reimbursements	—			—			177			219
Benefits paid	(21,932		)	(21,037		)	(2,361		)	(2,382		)
Other	(42		)	688			—			—
Benefit obligation at end of year	$	636,210		$	552,760		$	17,022		$	16,885
Change in plan assets
Fair value of plan assets at beginning of year	$	450,632		$	398,657		$	—		$	—
Actual return on plan assets	33,471			57,507			—			—
Employer contributions	23,318			15,505			2,247			2,223
Plan participant contributions	—			—			114			159
Benefits paid	(21,932		)	(21,037		)	(2,361		)	(2,382		)
Fair value of plan assets at end of year	$	485,489		$	450,632		$	—		$	—
Funded status
Funded status	$	(150,721	)	$	(102,128	)	$	(17,022	)	$	(16,885	)
Unrecognized net actuarial loss (1)	213,712			152,854			5,884			4,996
Unrecognized prior service cost (benefit) (1)	1,935			2,196			(1,450		)	(1,967		)
Prepaid (accrued) pension cost	$	64,926		$	52,922		$	(12,588	)	$	(13,856	)
Amounts recognized in balance sheets
Current liabilities	$	(2,846	)	$	(2,711	)	$	(1,693	)	$	(1,797	)
Noncurrent liabilities (2)	(147,875		)	(99,417		)	(15,329		)	(15,088		)
Accumulated other comprehensive income	215,647			155,050			4,434			3,029
Net amount recognized	$	64,926		$	52,922		$	(12,588	)	$	(13,856	)
Change in accumulated other comprehensive      income
Balance at beginning of year	$	155,050		$	137,368		$	3,029		$	1,485
Prior service (cost) credit recognized during the year	(259		)	(197		)	517			517
Net actuarial losses recognized during the year	(9,497		)	(5,688		)	(389		)	(284		)
Prior service cost occurring during the year	—			748			—			—
Net actuarial losses occurring during the year	70,353			22,819			1,277			1,311
Balance at end of year	$	215,647		$	155,050		$	4,434		$	3,029

(1) Represents amounts in accumulated other comprehensive income that have not yet been recognized as components of net periodic benefit costs.

(2) Included in the consolidated balance sheets in pensions and other benefits and other postretirement benefits are international plans.

Schedule of Net Benefit Costs

	Pension Benefits									Other Benefits
	2011			2010			2009			2011			2010			2009
Components of net periodic benefit      cost
Service cost	$	10,854		$	9,994		$	10,902		$	—		$	—		$	1
Interest cost	31,491			30,723			28,947			930			993			1,127
Expected return on plan assets	(40,735		)	(38,412		)	(36,973		)	—			—			—
Amortization of prior service cost (1)	259			197			271			(517		)	(517		)	(517		)
Recognized net actuarial loss	9,497			5,688			3,345			389			284			442
Net periodic pension benefit cost	$	11,366		$	8,190		$	6,492		$	802		$	760		$	1,053

(1) The annual amortization of pension benefits prior service cost is determined as the increase in projected benefit obligation due to the plan change divided by the average remaining service period of participating employees expected to receive benefits under the plan.

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets

The following table represents information for pension plans with an accumulated benefit obligation in excess of plan assets at December 31:

	2011		2010
Projected benefit obligation	$	636,210	$	552,760
Accumulated benefit obligation	580,200		501,685
Fair value of plan assets	485,489		450,632

Schedule of Assumptions Used

The following table represents the weighted-average assumptions used to determine benefit obligations at December 31:

	Pension Benefits				Other Benefits
	2011		2010		2011		2010
Discount rate	5.04	%	5.83	%	5.04	%	5.83	%
Rate of compensation increase	3.25	%	3.25	%	N/A		N/A

The following table represents the weighted-average assumptions used to determine periodic benefit cost at December 31:

	Pension Benefits				Other Benefits
	2011		2010		2011		2010
Discount rate	5.83	%	6.33	%	5.83	%	6.33	%
Expected long-term return on plan assets	8.50	%	8.50	%	N/A		N/A
Rate of compensation increase	3.25	%	3.25	%	N/A		N/A

Schedule of Health Care Cost Trend Rates

The following table represents assumed health care cost trend rates at December 31:

	2011		2010
Healthcare cost trend rate assumed for next year	8.0	%	7.4	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.2	%	4.2	%
Year that rate reaches ultimate trend rate	2099		2099

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

A one-percentage-point change in assumed healthcare cost trend rates would have the following effects:

	One-Percentage-Point Increase		One-Percentage-Point Decrease
Effect on total of service and interest cost	$	58	$	(52	)
Effect on postretirement benefit obligation	1,010		(914		)

Schedule of Allocation of Plan Assets

The following table summarizes the Company’s target mix for these asset classes in 2012, which are readjusted at least quarterly within a defined range, and the Company’s actual pension plan asset allocation as of December 31, 2011 and 2010:

	Target Allocation Percentage	Actual Allocation Percentage
	2012	2011	2010
Equity securities	45%	35%	45%
Debt securities	40%	51%	43%
Real estate	5%	4%	3%
Other	10%	10%	9%
Total	100%	100%	100%

The following table summarizes the fair value of the Company’s plan assets as of December 31, 2011:

	Fair Value		Level 1		Level 2		Level 3
Cash and other	$	50,389	$	50,389	$	—	$	—
Mutual funds:
U.S. mid growth	15,771		15,771		—		—
Equity securities:
U.S. mid cap value	14,672		14,672		—		—
U.S. small cap core	17,253		17,253		—		—
International developed markets	37,345		37,345		—		—
Fixed income securities:
U.S. corporate bonds	68,356		—		68,356		—
International corporate bonds	2,316		—		2,316		—
U.S. government	3,436		—		3,436
Other fixed income	598		—		598		—
Emerging markets	17,334		—		17,334		—
Common collective trusts:
Real estate (a)	16,443		—		—		16,443
Other (b)	191,421		—		191,421		—
Alternative investments:
Multi-strategy hedge funds (c)	26,605		—		—		26,605
Private equity funds (d)	23,550		—		—		23,550
	$	485,489	$	135,430	$	283,461	$	66,598

The following table summarizes the fair value of the Company’s plan assets as of December 31, 2010:

	Fair Value		Level 1		Level 2		Level 3
Cash and other	$	55	$	55	$	—	$	—
Mutual funds:
U.S. mid growth	18,240		18,240		—		—
Equity securities:
U.S. mid cap value	16,640		16,640		—		—
U.S. small cap core	21,610		21,610		—		—
International developed markets	43,816		43,816		—		—
Fixed income securities:
U.S. corporate bonds	68,108		—		68,108		—
International corporate bonds	2,568		—		2,568		—
U.S. government	734				734
Other fixed income	1,982		—		1,982		—
Emerging markets	25,666		—		25,666		—
Common collective trusts:
Real estate (a)	14,180		—		—		14,180
Other (b)	194,438		—		194,438		—
Alternative investments:
Multi-strategy hedge funds (c)	22,107		—		—		22,107
Private equity funds (d)	20,488		—		—		20,488
Total	$	450,632	$	100,361	$	293,496	$	56,775

(a) Real estate common collective trust The objective of the real estate common collective trust (CCT) is to achieve long-term returns through investments in a broadly diversified portfolio of improved properties with stabilized occupancies. As of December 31, 2011, investments in this CCT include approximately 46 percent office, 23 percent residential, 19 percent retail and 12 percent industrial, cash and other. As of December 31, 2010 investments in this CCT include approximately 33 percent office, 21 percent residential, 23 percent retail and 23 percent industrial, cash and other. Investments in the real estate CCT can be redeemed once per quarter subject to available cash, with a 45-day notice.

(b) Other common collective trusts At December 31, 2011, approximately 64 percent of the other CCTs are invested in fixed income securities including approximately 35 percent in mortgage-backed securities, 43 percent in corporate bonds and 20 percent in U.S. Treasury and other. Approximately 36 percent of the other CCTs at December 31, 2011 are invested in Russell 1000 Fund large cap index funds. At December 31, 2010, approximately 61 percent of the other CCTs are invested in fixed-income securities including approximately 40 percent in mortgage-backed securities, 35 percent in corporate bonds and 25 percent in U.S. Treasury and other. Approximately 39 percent of the other CCTs at December 31, 2010 are invested in Russell 1000 Fund large cap index funds. Investments in fixed-income securities can be redeemed daily.

(c) Multi-strategy hedge funds The objective of the multi-strategy hedge funds is to diversify risks and reduce volatility. At December 31, 2011 and 2010, investments in this class include approximately 35 percent long/short equity, 35 percent arbitrage and event investments and 30 percent in directional trading, fixed income and other. Investments in the multi-strategy hedge fund can be redeemed semi-annually with a 95-day notice.

(d) Private equity funds The objective of the private equity funds is to achieve long-term returns through investments in a diversified portfolio of private equity limited partnerships that offer a variety of investment strategies, targeting low volatility and low correlation to traditional asset classes. As of December 31, 2011 and 2010, investments in these private equity funds include approximately 50 percent and 45 percent, respectively, in buyout private equity funds that usually invest in mature companies with established business plans, 30 percent and 35 percent, respectively, in special situations private equity and debt funds that focus on niche investment strategies and 20 percent in both years, in venture private equity funds that invest in early development or expansion of business. Investments in the private equity fund can be redeemed only with written consent from the general partner, which may or may not be granted. At December 31, 2011 and 2010, the Company had unfunded commitments of underlying funds of $5,618 and $6,012.

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets

The following table summarizes the changes in fair value of level 3 assets for the years ended December 31:

	2011			2010
Balance, January 1	$	56,775		$	36,473
Acquisitions	5,394			15,540
Dispositions	(1,536		)	(383		)
Realized gain, net	537			1,907
Unrealized gain, net	5,428			3,238
Balance, December 31	$	66,598		$	56,775

Schedule of Amounts Expected To Be Recognized in Other Comprehensive Income (Loss)

The following table represents the amortization amounts expected to be recognized during 2012:

	Pension Benefits		Other Benefits
Amount of net prior service cost (credit)	$	258	$	(517	)
Amount of net loss	15,798		488

Schedule of Expected Benefit Payments

The following benefit payments, which reflect expected future service, are expected to be paid:

	Pension Benefits		Other Benefits before Medicare Part D Subsidy		Other Benefits after Medicare Part D Subsidy
2012	$	23,112	$	1,940	$	1,735
2013	24,647		1,917		1,715
2014	27,716		1,893		1,694
2015	28,674		1,836		1,641
2016	30,631		1,785		1,596
2017-2021	185,451		7,785		6,981

Schedule of Defined Contribution Plan, Employer Matching Contribution

The following table represents the Company's basic match percentage on participant qualified contributions up to a percentage of their compensation:

	Employees hired prior to July 1, 2003	Employees hired on or after July 1, 2003
Effective July 1, 2003 - March 31, 2009	60% of first 3% 40% of next 3%	100% of first 3% 60% of next 3%
Effective April 1, 2009 - December 31, 2010	None	30% of first 6%
Effective January 1, 2011 - December 31, 2011	25% of first 6%	55% of first 6%