Restructuring Costs Restructuring Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended					12 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Facility Closing	Sep. 30, 2013 Impairment of Tenant Improvements	Sep. 30, 2013 Impairment of Other Assets [Member]	Dec. 31, 2013 Impairment of Other Assets [Member]	Sep. 30, 2013 Severance
Restructuring Cost and Reserve [Line Items]
Charges to Expense	$ 6,018	$ 0	$ 6,018	$ 0	$ 2,414	$ 1,733	$ 650	$ 650	$ 1,221
Cash Payments			(741)		(112)	0	0		(629)
Restructuring Reserve, Settled without Cash			(2,383)		0	(1,733)	(650)		0
Accretion Expense			9		9	0	0		0
As of September 30, 2013	$ 2,903		$ 2,903		$ 2,311	$ 0	$ 0		$ 592