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Segment Reporting (Narrative)(Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Assets	$ 988,658	$ 1,047,353
Property, Plant and Equipment, Net	21,976	23,507
PrepaidExpensesDeferredTaxAssetsNetAndIncomeTaxReceivable	14,565	14,841
Deferred Compensation Liability and Accrued Liabilities Current and Noncurrent	6,778	6,366
Parent Company [Member]
Segment Reporting Information [Line Items]
Assets	93,205	88,380
PrepaidExpensesDeferredTaxAssetsNetAndIncomeTaxReceivable	2,848	2,306
Deferred Compensation Liability and Accrued Liabilities Current and Noncurrent	$ 827	$ 1,053

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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