Restructuring Charges Activity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Restructuring Reserve [Roll Forward]
Beginning Restructuring Reserve	$ 0
Restructuring charges	2,982	[1]
Restructuring Reserve, Settled with Cash	(1,405)
Inventory Write-offs	(683)
Ending Restructuring Reserve	894	[2]
One-time Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Restructuring Reserve	0
Restructuring charges	1,398	[1]
Restructuring Reserve, Settled with Cash	(504)
Ending Restructuring Reserve	894	[2]
Plant Consolidations [Member]
Restructuring Reserve [Roll Forward]
Beginning Restructuring Reserve	0
Restructuring charges	859	[1]
Restructuring Reserve, Settled with Cash	(859)
Ending Restructuring Reserve	0	[2]
Other Exit Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Restructuring Reserve	0
Restructuring charges	42	[1]
Restructuring Reserve, Settled with Cash	(42)
Ending Restructuring Reserve	0	[2]
Inventory Writedowns [Member]
Restructuring Reserve [Roll Forward]
Beginning Restructuring Reserve	0
Restructuring charges	683	[1]
Inventory Write-offs	(683)
Ending Restructuring Reserve	$ 0	[2]

[1] Costs associated with the write-off of inventory are included in cost of materials in the condensed consolidated statements of operations and comprehensive loss.

[2] Cash payments are expected to be made during the second quarter of 2013.