Pension Plan (Tables)

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

Pension Plan [Abstract]

Schedule Of Reconciliation Of Defined Benefit Pension Plan

	2011			2010
	(000s)
Change in plan assets:
Fair value of plan assets at beginning of year	$	73,402		$	61,451
Actual return (loss) on plan assets		5,689			10,027
Employer contributions		14,065			6,657
Benefits paid		(4,541	)		(4,256	)
Administrative expenses		(675	)		(477	)
Fair value of plan assets at end of year	$	87,940		$	73,402
Change in benefit obligation:
Benefit obligation at beginning of year	$	93,513		$	85,476
Service cost		1,162			1,140
Interest cost		5,047			4,958
Benefits paid		(4,541	)		(4,256	)
Actuarial (gain) loss		13,265			6,195
Benefit obligation at end of year	$	108,446		$	93,513
Amounts recognized in the Consolidated Balance Sheet:
Other noncurrent liabilities		20,506			20,110
Total liability at end of year	$	20,506		$	20,110
Additional year end information for Pension Plan
Projected benefit obligation	$	108,446		$	93,513
Accumulated benefit obligation		106,609			91,559
Fair value of plan assets		87,940			73,402

Schedule Of Components Of Net Periodic Cost (Benefit)

	2011			2010			2009
	(000s)
Components of net periodic cost (benefit)
Service cost	$	1,162		$	1,140		$	1,191
Interest cost		5,047			4,958			4,834
Expected return on plan assets		(6,566	)		(5,151	)		(3,927	)
Recognized actuarial loss		2,427			2,538			4,676
Net periodic cost	$	2,070		$	3,485		$	6,774

Schedule Of Measurement Dates

	2011		2010
Measurement Dates
Benefit obligations		12/31/2011		12/31/2010
Fair value of plan assets		12/31/2011		12/31/2010

Schedule Of Weighted Average Assumptions

	2011			2010
Weighted average assumptions as of December 31
Discount rate		4.40	%		5.54	%
Rate of compensation increase		4.00	%		4.00	%

Schedule Of Weighted-Average Assumptions For Net Periodic Benefit Cost Calculations

	2011			2010			2009
Weighted-average assumptions for net periodic benefit cost calculations
Discount rate		5.54	%		5.96	%		5.87	%
Expected long-term rate at return on plan assets		8.00	%		8.00	%		8.00	%
Rate of compensation increase		4.00	%		4.00	%		4.00	%

Schedule Of Market Values Of Pension Plan Assets

December 31, 2011	Total		Level 1		Level 2		Level 3
Equities:
U.S. Large Cap	$	18,921	$	—	$	18,921	$	—
U.S. Mid Cap		1,281		—		1,281		—
U.S. Small-Mid Cap		6,332		—		6,332		—
U.S. Small Cap		1,282		—		1,282		—
International Developed		8,692		—		8,692		—
Emerging Markets		3,123		—		3,123		—
Fixed income:
Long Duration Fixed Income		44,587		—		44,587		—
Real Estate:
REIT Fund		3,269		—		3,269		—
Tangible Assets:
Commodities		—		—		—		—
Cash/Currency:
Cash Equivalents		453		—		453		—
Total market value	$	87,940	$	—	$	87,940	$	—

December 31, 2010	Total		Level 1		Level 2		Level 3
Equities:
U.S. Large Cap	$	22,010	$	—	$	22,010	$	—
U.S. Mid Cap		1,468		—		1,468		—
U.S. Small-Mid Cap		6,295		—		6,295		—
U.S. Small Cap		1,471		—		1,471		—
International Developed		10,353		—		10,353		—
Emerging Markets		3,709		—		3,709		—
Fixed income:
Core Fixed Income		11,542		—		11,542		—
Long Duration Fixed Income		11,421		—		11,421		—
Real Estate:
REIT Fund		3,740		—		3,740		—
Tangible Assets:
Commodities		—		—		—		—
Cash/Currency:
Cash Equivalents		1,393		—		1,393		—
Total market value	$	73,402	$	—	$	73,402	$	—

Schedule Of Estimated Future Benefit Payments

Estimated Future Benefit Payments (000s)
2012	$	5,100
2013		5,400
2014		5,664
2015		5,895
2016		6,117
2017-2021		33,216
Total	$	61,392

Schedule Of Plan Assets Category

	2011			2010
Plan Assets
Asset Category
Equity securities		45	%		62	%
Fixed income securities		50	%		31	%
Other		5	%		7	%
Total		100	%		100	%

Schedule Of Asset Allocation Policy And Ranges For Overall Risk And Return Objectives Of Portfolio

	Policy			As of 12/31/11			Permitted Range
Total Equity		46	%		45	%		43-49	%
Total Fixed Income		50	%		50	%		45-55	%
Other		4	%		5	%		0-10	%