Share Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Share Based Compensation [Line Items]
Share based compensation	$ 4,631
Cost of Goods Sold
Share Based Compensation [Line Items]
Share based compensation	83
Research and development and engineering
Share Based Compensation [Line Items]
Share based compensation	112
Selling, general and administrative
Share Based Compensation [Line Items]
Share based compensation	4,385
Restructuring, restatement related costs, post-emergence fees and other
Share Based Compensation [Line Items]
Share based compensation	$ 51