Benefit Plans and Other Postretirement Benefits (Tables)

12 Months Ended

Dec. 31, 2011

Pension Benefits

Defined Benefit Plan Disclosure

Change in benefit obligation, fair value of plan assets and funded status of defined benefit pension plans

	December 31,
	2011			2010
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	457,321		$	429,800
Service cost	7,832			7,542
Interest cost	22,684			23,100
Plan participants’ contributions	—			26
Plan amendments	—			5,452
Actuarial loss	27,642			17,675
Foreign exchange translation	(2,450		)	(3,947		)
Benefits paid	(24,420		)	(22,327		)
Projected benefit obligation at end of year	488,609			457,321
Change in plan assets:
Fair value of plan assets at beginning of year	296,530			268,177
Actual return on plan assets	(2,001		)	29,878
Employer contributions	22,844			17,267
Plan participants’ contributions	—			26
Foreign exchange translation	(2,131		)	636
Benefits paid	(20,188		)	(19,454		)
Fair value of plan assets at end of year	295,054			296,530
Funded status	$	(193,555	)	$	(160,791	)

Schedule of components of net pension expense

	Year Ended December 31,
	2011			2010			2009
Components of net pension expense:
Service cost	$	7,073		$	5,907		$	7,043
Interest cost	22,684			23,100			23,276
Expected return on plan assets	(25,226		)	(28,016		)	(25,026		)
Net amortization of actuarial losses	14,528			17,051			11,238
Net pension expense	$	19,059		$	18,042		$	16,531

Schedule of defined benefit plan weighted average assumptions used in calculating benefit obligation and net periodic benefit cost

	Weighted-average assumptions used to determine benefit obligations at December 31,
	Pension Benefits				Other Benefits
	2011		2010		2011		2010
Discount rate:
U.S. plans	4.45	%	5.20	%	4.25	%	4.85	%
International plans	4.97	%	5.26	%	n/a		n/a
Rate of compensation increase:
U.S. plans	3.00	%	3.00	%	n/a		n/a
International plans	2.83	%	2.97	%	n/a		n/a

	Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31,
	Pension Benefits						Other Benefits
	2011		2010		2009		2011		2010		2009
Discount rate:
U.S. plans	5.20	%	5.75	%	6.25	%	4.85	%	5.40	%	6.25	%
International plans	5.26	%	5.46	%	6.20	%	n/a		n/a		n/a
Expected long-term return on assets:
U.S. plans	8.25	%	8.25	%	8.25	%	n/a		n/a		n/a
International plans	6.30	%	6.63	%	6.74	%	n/a		n/a		n/a
Rate of compensation increase:
U.S. plans	3.00	%	3.00	%	3.00	%	n/a		n/a		n/a
International plans	2.97	%	2.96	%	2.43	%	n/a		n/a		n/a

Fair values of company's pension plan assets by asset category

	Fair Value Measurements at December 31, 2011
Asset Category	Total		Quoted Prices in Active Markets for IdenticalAssets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Equity securities:
U.S. securities	$	103,229	$	80,651	$	22,578	$	—
International securities	77,250		40,329		36,921		—
	180,479		120,980		59,499		—
Fixed income securities:
U.S. securities	72,888		54,398		18,490		—
International securities	38,602		—		38,602		—
	111,490		54,398		57,092		—
Cash and cash equivalents	3,085		3,085		—		—
Total	$	295,054	$	178,463	$	116,591	$	—

	Fair Value Measurements at December 31, 2010
Asset Category	Total		Quoted Prices in Active Markets for IdenticalAssets (Level 1)		Significant Observable Inputs  (Level 2)		Significant Unobservable Inputs (Level 3)
Equity securities:
U.S. securities	$	84,675	$	77,107	$	7,568	$	—
International securities	91,754		50,983		40,771		—
	176,429		128,090		48,339		—
Fixed income securities:
U.S. securities	75,165		56,707		18,458		—
International securities	31,531		—		31,531		—
	106,696		56,707		49,989		—
Cash and cash equivalents	13,405		13,405		—		—
Total	$	296,530	$	198,202	$	98,328	$	—

Benefit payments related to the pension plans, including amounts to be paid out of company assets and reflecting future expected service

2012	$	21,668
2013	22,435
2014	23,424
2015	24,569
2016	25,738
2017-2021	144,261

Other Postretirement Benefits

Defined Benefit Plan Disclosure

Change in benefit obligation of postretirement plans

	December 31,
	2011			2010
Change in benefit obligation:
Benefit obligation at beginning of year	$	19,095		$	14,832
Service cost	198			165
Interest cost	843			786
Paid benefits and expenses	(1,139		)	(2,003		)
Actuarial (gain) loss	(2,299		)	5,315
Benefit obligation at end of year	$	16,698		$	19,095

Schedule of components of net pension expense

	Year ended December 31,
	2011		2010		2009
Components of net post-retirement benefit cost:
Service cost	$	198	$	165	$	160
Interest cost	843		786		836
Amortization of transition obligation	62		62		62
Net amortization of actuarial losses	1,291		882		773
Net postretirement benefit cost	$	2,394	$	1,895	$	1,831