Restructuring Charges Narrative (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2013		Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 1,050	[1]				$ 1,050	[1]	$ 0
Restructuring Charges	300		885	6,072	2,982	10,239	[2]
Restructuring and Related Cost, Expected Cost						12,400
Restructuring Plan 1 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	921					921		0
Restructuring Charges						9,798	[2]
Restructuring and Related Cost, Expected Cost						10,000
Restructuring Plan 2 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	129					129		0
Restructuring Charges						441	[2]
Restructuring and Related Cost, Expected Cost						2,400
Accrued Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	595					595
Other Noncurrent Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 455					$ 455

[1] (b) Payments on certain of the lease obligations are scheduled to continue until 2016. Market conditions and the Company’s ability to sublease these properties could affect the ultimate charge related to the lease obligations. Any potential recoveries or additional charges could affect amounts reported in the consolidated financial statements of future periods. As of December 31, 2013, the short-term portion of the restructuring liability of $595 is included in accrued liabilities and the long-term portion of $455 is included in other non-current liabilities in the Consolidated Balance Sheet.

[2] (a) Costs associated with the write-off of inventory are included in cost of materials in the consolidated statements of operations and comprehensive loss. All other costs are recorded to the restructuring charges line item within the consolidated statements of operations and comprehensive loss as they are incurred.