Property and Equipment, Net (Parenthetical) (Detail) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Property, Plant and Equipment [Line Items]
Impairment of property and equipment	$ 4,003,000	$ 4,003,000
Reversal of accumulated depreciation	3,100,000	3,100,000
Land, building and leasehold improvements
Property, Plant and Equipment [Line Items]
Impairment of property and equipment		400,000
Plant and machinery
Property, Plant and Equipment [Line Items]
Impairment of property and equipment		3,600,000
Purchased software
Property, Plant and Equipment [Line Items]
Impairment of property and equipment		500,000
Furniture Fixtures And Office Equipment
Property, Plant and Equipment [Line Items]
Impairment of property and equipment		$ 2,600,000