Restructuring Charges (2004 Restructuring Charge) (Details) (USD $) In Thousands			6 Months Ended
Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 2004 Restructuring Charge [Member]
Accrued restructuring charge, beginning balance			$ 6,006
Accretion expense			185
Cash payments			(787)
Accrued restructuring charge, ending balance			5,404
Less current portion			2,127
Accrued restructuring charges, net	$ 3,277	$ 3,952	$ 3,277

Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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