Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Periodic Benefit Costs of Pension and Post-Retirement Healthcare

Components of the net periodic benefit cost related to the Company’s pension and post-retirement healthcare plans for the three months ended September 30, 2012 and 2011, the nine months ended September 30, 2012, the 249 days ended September 30, 2011 and the 24 days ended January 24, 2011 are presented below (in thousands).

	Three Months Ended September 30, 2012						Three Months Ended September 30, 2011
	Qualified Pension			Post- retirement Healthcare			Qualified Pension			Post- retirement Healthcare
Service cost	$	3,649		$	5,923		$	3,597		$	6,935
Interest cost	3,695			5,774			3,660			7,194
Expected return on plan assets	(3,356		)	(8		)	(3,894		)	(5		)
Amortization of actuarial loss	575			1,398			—			—
Plan settlement	89			—			—			—
Net periodic benefit cost	$	4,652		$	13,087		$	3,363		$	14,124

													Predecessor Company
	Nine Months Ended September 30, 2012						Two Hundred Forty-Nine Days Ended September 30, 2011						Twenty-Four Days Ended January 24, 2011
	Qualified Pension			Post- retirement Healthcare			Qualified Pension			Post- retirement Healthcare			Qualified Pension			Post- retirement Healthcare
Service cost	$	11,841		$	19,491		$	8,892		$	14,118		$	849		$	1,167
Interest cost	10,994			18,139			9,752			15,216			934			1,252
Expected return on plan assets	(9,887		)	(25		)	(9,950		)	(10		)	(1,089		)	(1		)
Amortization of prior service cost	—			—			—			—			98			276
Amortization of actuarial loss	1,617			4,762			—			—			283			368
Plan settlement	445			—			—			—			—			—
Net periodic benefit cost	$	15,010		$	42,367		$	8,694		$	29,324		$	1,075		$	3,062