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					16,679		16,679	16,679
Retirement of treasury stock	(4)	(1,248)				796		(456)
Amortization of actuarial losses			3,103	2,582			5,685	5,685
Amortization of prior service cost (credit)			372	(4,883)			(4,511)	(4,511)
Comprehensive income							17,853
Balance at Jun. 30, 2011	$ 121	$ 98,863	$ (113,270)	$ 17,137	$ 206,282			$ 209,133

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 AICPA
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6508144

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-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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-Publisher SEC
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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

- Definition

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

- Definition

Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity.

+ References+ Details

- Definition

Equity impact of the par value of shares of common and preferred stock retired from treasury during the period. This element is used only when Treasury Stock is accounted for under the cost versus the par value method.

+ References+ Details