Condensed Consolidated Statement Of Stockholders' Equity And Comprehensive Income (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) Pensions [Member]	Accumulated Other Comprehensive Income (Loss) OPEB [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Comprehensive Income [Member]	Total
Balance at Dec. 31, 2010	$ 125	$ 100,111	$ (116,745)	$ 19,438	$ 189,603	$ (796)		$ 191,736
Net income					22,115		22,115	22,115
Retirement of treasury stock	(4)	(1,248)				796		(456)
Amortization of actuarial losses			4,687	3,872			8,559	8,559
Amortization of prior service cost (credit)			558	(7,323)			(6,765)	(6,765)
Other, net		141						141
Comprehensive income							23,909
Balance at Sep. 30, 2011	$ 121	$ 99,004	$ (111,500)	$ 15,987	$ 211,718			$ 215,330

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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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6508144

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Net Income

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-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details

- Definition

The adjustment out of other comprehensive income for prior service costs recognized as a component of net period benefit cost during the period, after tax.

+ References

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+ Details

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The adjustment out of other comprehensive income for actuarial gains or losses recognized as a component of net periodic benefit cost during the period, after tax.

+ References+ Details