Employee Benefit Plan Obligations (Tables)

12 Months Ended

Dec. 31, 2011

Employee Benefit Plan Obligations (Tables) [Abstract]

Obligation and funded status of the pension and postretirement benefit plans

(in thousands)	Pension Benefits						Postretirement Benefits
Change in benefit obligation	2011			2010			2011			2010
Benefit obligation at beginning of year	$	90,603		$	74,875		$	24,593		$	21,294
Service cost		—			1,614			555			465
Interest cost		4,578			4,339			1,285			1,213
Actuarial (gains)/losses		16,363			12,120			6,020			2,383
Participant contributions		—			—			478			444
Retiree drug subsidy received		—			—			202			118
Benefits paid		(1,568	)		(2,345	)		(1,575	)		(1,324	)
Benefit obligation at end of year	$	109,976		$	90,603		$	31,558		$	24,593

(in thousands)	Pension Benefits						Postretirement Benefits
Change in plan assets	2011			2010			2011			2010
Fair value of plan assets at beginning of year	$	84,097		$	70,423		$	—		$	—
Actual gains (loss) on plan assets		(91	)		9,852			—			—
Company contributions		5,167			6,167			1,097			880
Participant contributions		—			—			478			444
Benefits paid		(1,568	)		(2,345	)		(1,575	)		(1,324	)
Fair value of plan assets at end of year	$	87,605		$	84,097		$	—		$	—
Funded status of plans at end of year	$	(22,371	)	$	(6,506	)	$	(31,558	)	$	(24,593	)

Amounts recognized in the Consolidated Balance Sheets

	Pension Benefits						Postretirement Benefits
(in thousands)	2011			2010			2011			2010
Accrued expenses	$	(213	)	$	(210	)	$	(1,211	)	$	(1,196	)
Employee benefit plan obligations		(22,158	)		(6,296	)		(30,347	)		(23,397	)
Net amount recognized	$	(22,371	)	$	(6,506	)	$	(31,558	)	$	(24,593	)

Pre-tax amounts recognized in accumulated other comprehensive loss

	Pension Benefits					Postretirement Benefits
(in thousands)	Unamortized Actuarial Net Losses			Unamortized Prior Service Costs		Unamortized Actuarial Net Losses			Unamortized Prior Service Costs
Balance at beginning of year	$	39,161		$	—	$	10,761		$	(3,070	)
Amounts arising during the period		22,691			—		6,020			—
Amounts recognized as a component of net periodic benefit cost		(940	)		—		(901	)		543
Balance at end of year	$	60,912		$	—	$	15,880		$	(2,527	)

Amounts in accumulated other comprehensive loss expected to be recognized as components of net periodic benefit cost

(in thousands)	Pension		Postretirement			Total
Prior service cost	$	—	$	(543	)	$	(543	)
Net actuarial loss		1,799		1,306			3,105

Amounts applicable to the Company's defined benefit plans with accumulated benefit obligations in excess of plan assets

	December 31,
(in thousands)	2011		2010
Projected benefit obligation	$	109,976	$	90,603
Accumulated benefit obligation	$	109,976	$	90,357

Defined benefit plan estimated future benefit payments

Year	Expected Pension Benefit Payout		Expected Postretirement Benefit Payout		Medicare Part D Subsidy
2012	$	3,784	$	1,372	$	(161	)
2013		3,980		1,455		(187	)
2014		4,346		1,547		(209	)
2015		5,036		1,638		(236	)
2016		5,279		1,723		(267	)
2017-2021		31,164		10,040		(1,903	)

Components of the net periodic benefit cost

	Pension Benefits									Postretirement Benefits
(in thousands)	2011			2010			2009			2011			2010			2009
Service cost	$	—		$	1,614		$	2,861		$	555		$	465		$	412
Interest cost		4,578			4,339			4,001			1,285			1,213			1,155
Expected return on plan assets		(6,236	)		(5,451	)		(4,356	)		—			—			—
Amortization of prior service cost		—			—			(392	)		(543	)		(511	)		(511	)
Recognized net actuarial loss		940			1,817			3,503			901			691			624
Curtailment gain		—			—			(4,132	)		—			—			—
Net periodic benefit cost	$	(718	)	$	2,319		$	1,485		$	2,198		$	1,858		$	1,680

Weighted average assumptions of pension and postretirement benefits for each year

	Pension Benefits									Postretirement Benefits
	2011			2010			2009			2011			2010			2009
Used to Determine Benefit Obligations at Measurement Date
Discount rate (a)		4.30	%		5.20	%		5.70	%		4.30	%		5.30	%		5.80	%
Rate of compensation increases		N/A			3.50	%		3.50	%		—			—			—
Used to Determine Net Periodic Benefit Cost for Years ended December 31
Discount rate (b)		5.20	%		5.70	%		6.10	%		5.30	%		5.80	%		6.10	%
Expected long-term return on plan assets		7.75	%		8.00	%		8.25	%		—			—			—
Rate of compensation increases		3.50	%		3.50	%		4.50	%		—			—			—

Assumed health care cost trend rates at beginning of year

	2011			2010
Health care cost trend rate assumed for next year		7.5	%		8.0	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		5.0	%		5.0	%
Year that the rate reaches the ultimate trend rate		2017			2017

Assumed health care cost trend rate has an effect on the amounts reported for postretirement benefits

	One-Percentage-Point
(in thousands)	Increase			Decrease
Effect on total service and interest cost components in 2011	$	(18	)	$	16
Effect on postretirement benefit obligation as of December 31, 2011		(164	)		140

Company's pension plan weighted average asset allocations

Asset Category	2011			2010
Equity securities		57	%		68	%
Fixed income securities		41	%		31	%
Cash and equivalents		2	%		1	%
		100	%		100	%

Defined benefit plan assets target allocations

	Percentage of Total Portfolio Market Value
	Minimum			Maximum			Single Security
Equity based		30	%		70	%		<5	%
Fixed income based		20	%		70	%		<5	%
Cash and equivalents		1	%		5	%		<5	%
Alternative investments		0	%		20	%		<5	%

Fair value of the assets (by asset category) in the Company's defined benefit pension plan

December 31, 2011

		$00,000		$00,000		$00,000		$00,000
(in thousands) Assets	Level 1		Level 2		Level 3		Total
Mutual funds	$	10,773	$	—	$	—	$	10,773
Money market fund		—		1,659		—		1,659
Equity funds		—		39,573		—		39,573
Fixed income funds		—		35,600		—		35,600
Total	$	10,773	$	76,832	$	—	$	87,605

December 31, 2010

		$00,000		$00,000		$00,000		$00,000
(in thousands) Assets	Level 1		Level 2		Level 3		Total
Mutual funds	$	12,119	$	—	$	—	$	12,119
Money market fund		—		793		—		793
Equity funds		—		45,502		—		45,502
Fixed income funds		—		25,683		—		25,683
Total	$	12,119	$	71,978	$	—	$	84,097