Methane Project (Schedule Of The Methane Project) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Methane Project [Line Items]
Methane project, at cost	$ 1,813	$ 1,822
Accumulated depreciation	(1,492)	(1,396)
Net	321	426
Methane Project [Member]
Methane Project [Line Items]
Methane project, at cost	4,865	5,421
Accumulated depreciation	(420)	(319)
Net	$ 4,445	$ 5,102

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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