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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net Income	$ 10,727	$ 13,747
Employee Benefits, net of tax:
Amortization of prior service cost, net of tax of $(6) and $1, respectively	(9)	2
Net Gain, net of tax of $50 and $211, respectively	76	315
Total other comprehensive income	67	317
Comprehensive Income	$ 10,794	$ 14,064

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The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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