Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 76,397	$ 79,799
Less: Accumulated depreciation	62,560	63,353
Property, Plant and Equipment, Net, Total	13,837	16,446
Land, Buildings And Other Support Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,777	10,647
Network Communications Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	31,289	35,183
Telephone And Online Plant [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	34,307	33,935
Plant In Service [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	76,373	79,765
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 24	$ 34

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount 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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- 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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