Retirement Plan Benefits (Tables)

12 Months Ended

Dec. 31, 2011

Components of Change in Benefit Obligation of Pension Plans

	December 31,		December 31,
	2011		2010
Benefit obligation, at beginning of year	$	427,213	$	386,316
Interest cost		22,663		22,685
Benefits paid		(15,493)		(15,516)
Actuarial loss		48,226		33,728
Benefit obligation, at end of year	$	482,609	$	427,213

Reconciliation of Beginning and Ending Balances of Fair Value of Assets of Pension Plans

	December 31,		December 31,
	2011		2010
Fair value of plan assets, at beginning of year	$	379,617	$	353,562
Actual return on plan assets		31,735		41,571
Benefits paid		(15,493)		(15,516)
Fair value of plan assets, at end of year	$	395,859	$	379,617

Components of Net Periodic Expense (Benefit) of Pension Plans

	2011		2010		2009
Interest cost	$	22,663	$	22,685	$	22,027
Expected return on plan assets		(25,008)		(23,304)		(23,832)
Recognized actuarial loss		11,174		12,616		14,584
Net periodic expense (benefit)	$	8,829	$	11,997	$	12,779

Weighted Average Assumptions Used in Pension Plans to Determine Benefit Obligations

	December 31,	December 31,	December 31,
	2011	2010	2009
Discount rate	4.6%	5.4%	6.0%
Rate of compensation increase	N/A	N/A	N/A

Weighted Average Assumptions Used in Pension Plans to Determine Periodic Benefit Cost

	December 31,	December 31,	December 31,
	2011	2010	2009
Discount rate	5.4%	6.0%	6.6%
Expected long-term rate of return on plan assets	6.75%	6.75%	8.25%
Rate of compensation increase	N/A	N/A	N/A

Benefit Payments

2012	$	20,260
2013		21,247
2014		22,343
2015		23,642
2016		25,168
2017-2021		148,392

Pension Plans' Assets at Fair Value

	December 31, 2011
	Level 1		Level 2		Level 3		Total
Common collective trusts	$	—	$	284,250	$	—	$	284,250
Mutual funds		—		2,666		—		2,666
U.S. treasury securities		2,979		—		—		2,979
Corporate debt securities		—		105,082		—		105,082
Total	$	2,979	$	391,998	$	0	$	394,977
Plan payables, net of accrued interest and dividends								882
Total							$	395,859
	December 31, 2010
	Level 1		Level 2		Level 3		Total
Common collective trusts	$	—	$	278,447	$	—	$	278,447
Mutual funds		—		3,656		—		3,656
U.S. agency securities		—		20,700		—		20,700
U.S. treasury securities		11,799		—		—		11,799
Corporate debt securities		—		57,067		—		57,067
Municipal obligations		—		980		—		980
Asset-backed securities		—		2,602		—		2,602
Mortgaged-backed securities		—		3,837		—		3,837
Total	$	11,799	$	367,289	$	0	$	379,088
Plan payables, net of accrued interest and dividends								529
Total							$	379,617

Pension Plans' Investments at Fair Value Represented 5% or More of Pension Plans' Net Assets

	2011		2010
Collective Trust High Yield Fund	$	0	$	21,956
EB Daily Valued Large Cap Growth Stock Index Fund		0		18,497
EB Daily Valued Large Cap Value Stock Index Fund		0		19,605
EB Daily Valued Small Cap Stock Index Fund		23,038		34,069
EB Daily Valued Stock Index Fund		82,060		110,030
EB Daily Valued International Stock Index Fund		21,938		33,967
EB Long Term Government Bond Index		44,058		0
EB Long Term Credit Bond Index		60,111		21,765
U.S. Treasury Securities		0		11,799
U.S. Agency Securities		0		20,700
Corporate Debt Securities		105,082		57,067
	$	336,287	$	349,455

Weighted Average Target Asset Allocations

	December 31,
	2011
U.S. large capitalization equities	17%
U.S. small capitalization equities	4
International equities	4
U.S. long-duration fixed income	75
High yield fixed income	0
Total	100%

Actual Allocation of the Assets in the Pension Plans

	December 31,	December 31,
	2011	2010
U.S. large capitalization equities	29%	39%
U.S. small capitalization equities	6	9
International equities	7	11
U.S. long-duration fixed income	55	0
U.S. core fixed income	0	35
High yield fixed income	3	6
Total	100%	100%