Statements of Consolidated Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net Income	$ 99,153	$ 104,546	$ 88,443
Foreign currency translation adjustment	871	481	(1,331)
Unrealized gain (loss) on available-for-sale security, net of deferred tax of $0, $145, and $4 respectively	0	226	(6)
Actuarial gain (loss), net of deferred tax of $103,308, $1,903 and $104,425, respectively	161,631	(2,977)	(163,312)
Net actuarial loss included in net periodic benefit expense or income, net of deferred tax of $7,562, $7,969, and $4,373, respectively	11,827	12,465	6,837
Prior-service cost or credit, net of deferred tax of $7,505, $17,577, and $0, respectively	11,738	(27,493)	0
Amortization of prior service cost or credit included in net periodic benefit expense or income, net of deferred tax of $552, $465, and $468, respectively	863	(727)	(730)
Employee benefit plans	186,059	(18,732)	(157,205)
Total Other Comprehensive (Income) Loss	186,930	(18,025)	(158,542)
Comprehensive Income (Loss)	$ 286,083	$ 86,521	$ (70,099)