Pension Benefits (Tables)

12 Months Ended

Dec. 31, 2011

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

Schedule of Net Funded Status [Table Text Block]

	For the Years Ended December 31,
	2011			2010
	(in thousands)
Change in benefit obligations
Projected benefit obligation at beginning of year	$	23,867		$	18,550
Service cost	3,800			3,392
Interest cost	1,184			1,120
Amendments	170			—
Actuarial loss	1,957			2,480
Benefits paid	(1,498		)	(1,675		)
Projected benefit obligation at end of year	$	29,480		$	23,867
Change in plan assets
Fair value of plan assets at beginning of year	$	10,332		$	9,101
Actual return on plan assets	(176		)	1,181
Employer contribution	5,260			1,725
Benefits paid	(1,476		)	(1,675		)
Fair value of plan assets at end of year	$	13,940		$	10,332
Funded status at end of year	$	(15,540	)	$	(13,535	)

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

	As of December 31,
	2011		2010
	(in thousands)
Projected benefit obligation	$	29,480	$	23,867
Accumulated benefit obligation	$	21,697	$	17,457
Less: Fair value of plan assets	13,940		10,332
Underfunded accumulated benefit obligation	$	7,757	$	7,125

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

	As of December 31,
	2011		2010
	(in thousands)
Unrecognized actuarial losses	$	8,501	$	(5,892	)
Unrecognized prior service costs	170		—
Unrecognized transition obligation	—		—
Accumulated other comprehensive loss	$	8,671	$	(5,892	)

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

	As of December 31,
	2011			2010			2009
	(in thousands)
Net actuarial gain (loss)	$	(3,014	)	$	(1,937	)	$	(239	)
Prior service cost	(170		)	—			—
Less: Amortization of:
Actuarial loss	(405		)	(367		)	(358		)
Total other comprehensive income (loss)	$	(2,779	)	$	(1,570	)	$	119

Components of the net periodic benefit cost for both the Qualified and the Nonqualified Pension Plan

	For the Years Ended December 31,
	2011			2010			2009
	(in thousands)
Components of net periodic benefit cost
Service cost	$	3,800		$	3,392		$	2,500
Interest cost	1,184			1,120			934
Expected return on plan assets that reduces periodic pension cost	(880		)	(638		)	(430		)
Amortization of prior service cost	—			—			—
Amortization of net actuarial loss	405			367			372
Net periodic benefit cost	$	4,509		$	4,241		$	3,376

Schedule of Assumptions Used [Table Text Block]

	As of December 31,
	2011	2010	2009
Projected benefit obligation
Discount rate	4.7%	5.3%	6.1%
Rate of compensation increase	6.2%	6.2%	6.2%
Net periodic benefit cost
Discount rate	5.3%	6.1%	6.1%
Expected return on plan assets	7.5%	7.5%	7.5%
Rate of compensation increase	6.2%	6.2%	6.2%

Schedule of Allocation of Plan Assets [Table Text Block]

	Target		As of December 31,
Asset Category	2012		2011		2010
Equity securities	60.0	%	61.8	%	60.8	%
Debt securities	40.0	%	37.7	%	39.2	%
Other	—	%	0.5	%	—	%
Total	100.0	%	100.0	%	100.0	%

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

Assets:	Level 1		Level 2	Level 3
	(in thousands)
Cash and Money Market Funds	$	66	—	—
Equity Securities
Foreign Large Blend (1)	2,048		—	—
U.S. Small Blend (2)	2,290		—	—
U.S. Large Blend (3)	4,278		—	—
Fixed Income Securities
Intermediate Term Bond (4)	5,258		—	—
Total	$	13,940	—	—

Assets:	Level 1		Level 2		Level 3
	(in thousands)
Cash and Money Market Funds	$	4	$	—	$	—
Equity Securities
Foreign Large Blend (1)	1,444		—		—
U.S. Small Blend (2)	1,647		—		—
U.S. Large Blend (3)	3,185		—		—
Fixed Income Securities
Intermediate Term Bond (4)	4,052		—		—
Total	$	10,332	$	—	$	—

The following is a listing of the Company’s financial assets and liabilities that are measured at fair value on a recurring basis and where they are classified within the hierarchy as of December 31, 2010:

	Level 1		Level 2		Level 3
	(in thousands)
Assets:
Derivatives	$	—	$	62,332	$	—
Liabilities:
Derivatives	$	—	$	114,601	$	—
Net Profits Plan	$	—	$	—	$	135,850

Schedule of Expected Benefit Payments [Table Text Block]

Years Ending December 31,
2012	$	1,296
2013	2,360
2014	2,513
2015	2,205
2016	2,668
2017 through 2021	$	23,258