Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 4,366	$ 613
Restructuring Reserve, Beginning Balance	0	1,443
Restructuring Reserve, Period Expense	3,753
Restructuring Reserve, Settled with Cash	(1,973)
Restructuring Reserve, Settled without Cash	(337)
Restructuring Reserve, Ending Balance	1,443
Professional Fees [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Period Expense	5,178
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	3,254	0
Restructuring Reserve, Beginning Balance	0	1,443
Restructuring Reserve, Period Expense	3,254
Restructuring Reserve, Settled with Cash	(1,811)
Restructuring Reserve, Settled without Cash	0
Restructuring Reserve, Ending Balance	1,443
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	561	561
Restructuring Reserve, Beginning Balance	0	0
Restructuring Reserve, Period Expense	0
Restructuring Reserve, Settled with Cash	0
Restructuring Reserve, Settled without Cash	0
Restructuring Reserve, Ending Balance	0
Impairment of long lived assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	337	0
Restructuring Reserve, Beginning Balance	0	0
Restructuring Reserve, Period Expense	337
Restructuring Reserve, Settled with Cash	0
Restructuring Reserve, Settled without Cash	(337)
Restructuring Reserve, Ending Balance	0
Other restructuring costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	214	52
Restructuring Reserve, Beginning Balance		0
Restructuring Reserve, Period Expense	162
Restructuring Reserve, Settled with Cash	(162)
Restructuring Reserve, Settled without Cash	0
Restructuring Reserve, Ending Balance	$ 0