Summary of Accrual Activity (Detail) (USD $) In Thousands, unless otherwise specified			9 Months Ended
Sep. 30, 2012	Jan. 01, 2012	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan Involuntary termination costs	Sep. 30, 2012 Restructuring Fiscal Twenty Eleven Plan Other associated exit costs	Sep. 30, 2012 Restructuring Fiscal Twenty Zero Nine Plan	Sep. 30, 2012 Restructuring Fiscal Twenty Zero Nine Plan Contract termination costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring and other exit costs, beginning balance	$ 1,455	$ 5,660	$ 5,480	$ 5,480		$ 180	$ 180
Accrued restructuring and other exit costs, accrued			2,074		2,074	6	6
Accrued restructuring and other exit costs, incurred			(6,099)	(4,244)	(1,855)	(186)	(186)
Accrued restructuring and other exit costs, ending balance	$ 1,455	$ 5,660	$ 1,455	$ 1,236	$ 219

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.

+ References+ Details

Net total Increase or Decrease in the accrual for restructuring costs during the reporting period.

+ References+ Details

- Definition

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

+ References+ Details