Components of Reorganization Charges (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Schedule of Accrued Liabilities [Line Items]
Accrued Balance	$ 3,484
Accrual
Payments	1,243
Accrued Balance	2,241
Lease abandonment costs
Schedule of Accrued Liabilities [Line Items]
Accrued Balance	3,484
Accrual
Payments	1,243
Accrued Balance	$ 2,241

Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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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

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

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