Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of Changes in Projected Benefit Obligations [Table Text Block]

	Pension						Postretirement
	2011			2010			2011			2010
Change in Projected Benefit Obligation
Projected benefit obligation at beginning of year	$	346,464		$	324,554		$	21,158		$	21,361
Service cost	6,782			6,196			673			587
Interest cost	18,087			17,740			972			1,029
Actuarial loss	58,208			11,766			3,934			965
Plan amendments	—			1,704			(631		)	—
Employee contributions	—			—			1,609			1,042
Benefits paid	(16,394		)	(15,496		)	(2,882		)	(3,826		)
Projected benefit obligation at end of year	$	413,147		$	346,464		$	24,833		$	21,158

Schedule of Changes in Fair Value of Plan Assets [Table Text Block]

Change in Plan Assets
Fair value of plan assets at beginning of year	$	302,464		$	231,686		$	—		$	—
Actual return on plan assets	8,977			35,636			—			—
Employer contributions	1,552			51,510			1,273			2,784
Employee contributions	—			—			1,609			1,042
Benefits paid	(16,394		)	(15,496		)	(2,882		)	(3,826		)
Other expense	(944		)	(872		)	—			—
Fair value of plan assets at end of year	$	295,655		$	302,464		$	—		$	—

Schedule of Net Funded Status [Table Text Block]

Funded Status at End of Year:
Net accrued benefit cost	$	(117,492	)	$	(44,000	)	$	(24,833	)	$	(21,158	)

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

Amounts Recognized in the Consolidated
Balance Sheets Consist of:
Noncurrent assets	$	—		$	3,032		$	—		$	—
Current liabilities	(1,626		)	(1,475		)	(1,262		)	(1,566		)
Noncurrent liabilities	(115,866		)	(45,557		)	(23,571		)	(19,592		)
Net amount recognized	$	(117,492	)	$	(44,000	)	$	(24,833	)	$	(21,158	)

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

Net gains or losses and prior service costs or credits recognized in other comprehensive income for the three years ended December 31 are as follows:

	Pension									Postretirement
	2011			2010			2009			2011			2010			2009
Net (losses) gains	$	(75,995	)	$	1,348		$	7,778		$	(3,934	)	$	(965	)	$	(533	)
Prior service cost	—			(1,704		)	(5,352		)	631			—			—

Net gains or losses and prior service costs or credits reclassified from other comprehensive income and recognized as a component of pension and postretirement expense for the three years ended December 31 are as follows:

	Pension						Postretirement
	2011		2010		2009		2011		2010			2009
Amortization of losses	$	10,372	$	6,456	$	6,196	$	570	$	3,357		$	5,841
Amortization of prior service cost (benefit)	1,359		1,657		1,830		69		(5,334		)	(9,480		)

Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]

Net losses and prior service costs or credits that have not yet been included in pension and postretirement expense for the two years ended December 31, which have been recognized as a component of AOCI are as follows:

	Pension						Postretirement
	2011			2010			2011			2010
Prior service (cost) credit	$	(8,370	)	$	(9,729	)	$	167		$	(532	)
Net losses	(191,761		)	(126,138		)	(10,500		)	(7,137		)
Deferred income tax benefit	62,797			43,056			3,583			2,659
AOCI	$	(137,334	)	$	(92,811	)	$	(6,750	)	$	(5,010	)

Schedule of Projected Benefit Obligation and Accumulated Benefit Obligation in Excess of Fair Value [Table Text Block]

For pension and postretirement plans with accumulated benefit obligations in excess of plan assets, the following table sets forth the projected and accumulated benefit obligations and the fair value of plan assets for the two years ended December 31:

	2011		2010
Projected benefit obligation	$	437,980	$	323,918
Accumulated benefit obligation	392,182		285,590
Fair value of plan assets	295,655		255,728

Schedule of Net Benefit Costs [Table Text Block]

The following tables set forth the components of net pension and postretirement benefit cost that have been recognized during the three years ended December 31:

	Pension									Postretirement
	2011			2010			2009			2011		2010			2009
Components of Net Periodic Benefit Cost
Service cost	$	6,782		$	6,196		$	6,489		$	673	$	587		$	482
Interest cost	18,087			17,740			18,082			972		1,029			1,144
Expected return on plan assets	(25,819		)	(21,651		)	(21,427		)	—		—			—
Amortization of prior service cost (benefit)	1,359			1,657			1,830			69		(5,334		)	(9,480		)
Amortization of losses	10,372			6,456			6,196			570		3,357			5,841
Net periodic benefit cost (benefit)	$	10,781		$	10,398		$	11,170		$	2,284	$	(361	)	$	(2,013	)

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

The estimated pre-tax amounts that will be amortized from AOCI into net periodic benefit cost in 2012 are as follows:

	Pension		Postretirement
Amortization of loss	$	16,185	$	526
Amortization of prior service cost	1,308		25
Total amortization of AOCI loss	$	17,493	$	551

Schedule of Assumptions Used [Table Text Block]

The following table sets forth the principal assumptions inherent in the determination of benefit obligations and net periodic benefit cost of the pension and postretirement benefit plans as of December 31:

	Pension						Postretirement
	2011		2010		2009		2011		2010		2009
Assumptions used to determine benefit obligations at December 31:
Discount rate	4.20	%	5.25	%	5.80	%	4.10	%	5.10	%	5.50	%
Rate of compensation increase	4.50	%	4.50	%	4.50	%	4.50	%	4.50	%	4.50	%
Assumptions used to determine net periodic benefit cost for years ended December 31:
Discount rate	5.25	%	5.80	%	6.15	%	5.10	%	5.50	%	6.15	%
Expected long-term return on plan assets	8.50	%	8.50	%	8.50	%	—		—		—
Rate of compensation increase	4.50	%	4.50	%	4.50	%	4.50	%	4.50	%	4.50	%

Schedule of Health Care Cost Trend Rates [Table Text Block]

The following table sets forth the assumed health care cost trend rates at December 31:

	Postretirement
	2011		2010
Health care cost trend rate assumed for next year	8.00	%	8.50	%
Rate to which the cost trend rate is assumed to decline (ultimate trend rate)	5.00	%	5.00	%
Year that the rate reaches the ultimate trend rate	2017		2017

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

The following table shows the effect of a one percentage point change in assumed health care cost trends:

	1 Percent
Effect on:	Increase		Decrease
Total of service and interest cost components	$	171	$	(143	)
Accumulated postretirement benefit obligation	1,781		(1,533		)

Schedule of Allocation of Plan Assets [Table Text Block]

The Company’s pension plans’ asset allocation at December 31, 2011 and 2010, and target allocation ranges by asset category are as follows:

	Percentage of Plan Assets				Target Allocation Range
Asset Category	2011		2010
Domestic equity securities	44	%	44	%	40-45%
International equity securities	20	%	23	%	20-30%
Domestic fixed income securities	28	%	25	%	25-30%
International fixed income securities	5	%	5	%	4-6%
Real estate fund	3	%	3	%	2-4%
Total	100	%	100	%

The following table sets forth by level, within the fair value hierarchy (see Note 2 — Summary of Significant Accounting Policiesfor definition), the assets of the plans as of December 31, 2011 and 2010:

Asset Category	Fair Value at December 31, 2011 Level 1		Fair Value at December 31, 2010 Level 1
Domestic equity securities	$	128,834	$	130,274
International equity securities	57,728		68,878
Domestic fixed income securities	80,243		75,090
International fixed income securities	14,381		14,410
Real estate fund	9,846		8,986
Short-term investments	4,623		4,826
Total	$	295,655	$	302,464

Schedule of Expected Benefit Payments [Table Text Block]

Expected benefit payments in future years are as follows:

	Pension Benefits		Postretirement Benefits
2012	$	17,607	$	1,262
2013	18,657		1,388
2014	19,745		1,483
2015	20,721		1,559
2016	21,773		1,651
2017 - 2021	123,358		8,281