Fair Value Measurements Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis (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 Other Assets [Member]	Dec. 31, 2013 Impairment of Other Assets [Member]	Sep. 30, 2013 Nonrecurring	Sep. 30, 2013 Nonrecurring Facility Closing	Sep. 30, 2013 Nonrecurring Leasehold Improvements	Sep. 30, 2013 Nonrecurring Impairment of Other Assets [Member]	Sep. 30, 2013 Nonrecurring Fair Value, Inputs, Level 1	Sep. 30, 2013 Nonrecurring Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Facility exit liabilities								$ 2,427				$ 504	$ 1,923
Restructuring Charges	6,018	0	6,018	0	2,414	650	650		2,414
Leasehold improvements								0				0	0
Asset impairment charges			2,383	0						1,733	650
Other Assets, Fair Value Disclosure								$ 0				$ 0	$ 0
Initiation date			Aug. 19, 2013
Lease expiration date			Jul. 31, 2015