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Activity In Accrued Restructuring Balance (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 455
Additions based on charges during the year		1,096
Deductions based on payments during the period	(455)	(641)
Ending balance		$ 455

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

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