Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2012

Other Comprehensive Income [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Accumulated other comprehensive income (loss) includes the following items by components for the years ended December 31, 2012, 2011 and 2010 (in thousands):

	Defined Benefit Pension		Defined Benefit Post-Retirement		Gains and Losses on Derivative		Total
Balance as of January 1, 2010	(43,103	)	(1,224	)	(2,062	)	(46,389	)
Other comprehensive income (loss) before reclassifications:
Actuarial gain (loss) for retiree liabilities	(19,685	)	22,659		—		2,974
Unrealized gain (loss) for derivative instruments	—		—		(848	)	(848	)
Amounts reclassified from accumulated other comprehensive income:
Actuarial gain (loss)	2,068		321		—		2,389
Negative prior service cost	—		(4,168	)	—		(4,168	)
Hedging gain	—		—		(106	)	(106	)
Income Tax (Expense) or Benefit	6,395		(6,827	)	346		(86	)
Other comprehensive income (loss), net of tax	(11,222	)	11,985		(608	)	155
Balance as of December 31, 2010	(54,325	)	10,761		(2,670	)	(46,234	)
Other comprehensive income (loss) before reclassifications:
Actuarial gain (loss) for retiree liabilities	(91,715	)	192		—		(91,523	)
Unrealized gain (loss) for derivative instruments	—		—		631		631
Amounts reclassified from accumulated other comprehensive income:
Actuarial gain (loss)	2,700		211		—		2,911
Negative prior service cost	—		(5,552	)	—		(5,552	)
Hedging gain	—		—		(223	)	(223	)
Unrealized loss on derivative instruments	—		—		3,932		3,932
Income Tax (Expense) or Benefit	32,714		1,892		(1,595	)	33,011
Other comprehensive income (loss), net of tax	(56,301	)	(3,257	)	2,745		(56,813	)
Balance as of December 31, 2011	(110,626	)	7,504		75		(103,047	)
Other comprehensive income (loss) before reclassifications:
Actuarial gain (loss) for retiree liabilities	(27,518	)	168		—		(27,350	)
Amounts reclassified from accumulated other comprehensive income
Actuarial gain	10,681		433		—		11,114
Negative prior service cost	—		(5,552	)	—		(5,552	)
Hedging gain	—		—		(57	)	(57	)
Income Tax Benefit	5,861		1,724		20		7,605
Other comprehensive income (loss), net of tax	(10,976	)	(3,227	)	(37	)	(14,240	)
Balance as of December 31, 2012	(121,602	)	4,277		38		(117,287	)