Restructuring Charge (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013
Activity in the liabilities related to the restructuring charge
Remaining liability at the beginning of the period	$ 605
Cash payments	(159)
Non-cash charges and other	1
Restructuring charge	155
Remaining liability at the end of the period	602
less: current portion	(305)
Long-term portion	297
Lease Costs, Net of Estimated Sublease Income
Activity in the liabilities related to the restructuring charge
Remaining liability at the beginning of the period	613
Cash payments	(159)
Restructuring charge	155
Remaining liability at the end of the period	609
Other Costs
Activity in the liabilities related to the restructuring charge
Remaining liability at the beginning of the period	(8)
Non-cash charges and other	1
Remaining liability at the end of the period	$ (7)

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding 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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