Restructuring, Asset Impairment Charges and Other Items - Restructuring, Asset Impairment Charges and Other Items net (Parenthetical) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Expense And Other Items Net [Line Items]
Restructuring expense	$ 22,992,000	$ 57,318,000
Loss on the sale of a property	2,700,000
Asset impairment and exit costs	1,800,000
Gain (loss) on disposition of fixed assets		2,200,000
Acquisition related costs	8,400,000
Costs of transition service agreements	6,800,000
Litigation costs	9,300,000	3,400,000
Cost associated with transition service agreements		12,200,000
Sales and use tax related liability reversal		15,500,000
Reversal of accrued litigation costs			4,400,000
Depreciation adjustments related to assets reclassified			1,600,000
Intellectual properties [Member]
Restructuring Expense And Other Items Net [Line Items]
Write-off of intellectual property		4,500,000
Oregon [Member] | Land [Member]
Restructuring Expense And Other Items Net [Line Items]
Gain (loss) on disposition of fixed assets		6,400,000
Other Expense [Member] | Intellectual properties [Member]
Restructuring Expense And Other Items Net [Line Items]
Write-off of intellectual property		5,500,000
Lease and Contract Terminations [Member]
Restructuring Expense And Other Items Net [Line Items]
Restructuring expense	10,306,000	8,303,000
Lease and Contract Terminations [Member] | Former headquarter [Member]
Restructuring Expense And Other Items Net [Line Items]
Restructuring expense	$ 6,200,000