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Restructuring charges - Accrual for severance and related costs (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Schedule Of Impairment Severance And Other Costs [Line Items]  
Balance at January 1, 2012 $ 464
Severance & related charges 14,919
Payments (1) (2,553) [1]
Non-cash adjustments(2) (2,167) [2]
Balance at December 31, 2012 $ 10,663
[1] Includes payments related to COBRA and outplacement services which are assumed to be completed by the third month following an employee's departure.
[2] Includes cancellations due to employee departures prior to agreed upon end dates, employee transfers to open positions within the organization and subsequent adjustments to severance and related costs.