Restructure (Recovery) Costs (Details) (USD $)	8 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011
Restructure Costs
Restructure costs	$ 37,417,000	$ (47,000)	$ 25,086,000
Accrual for the settlement with former CFO as a restructure costs recovered		100,000
Cash expenditures related to restructure cost	30,700,000		31,700,000
Accrued liabilities related to restructure costs	6,700,000		100,000
Employee severance and workforce reductions
Restructure Costs
Restructure costs	(30,500,000)
Contract termination
Restructure Costs
Restructure costs	$ (6,900,000)