Restructuring Restructuring Long-lived Assets Measured at Fair Value (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Long Lived Assets Held-for-sale [Line Items]
Assets Held-for-sale, Long Lived	$ 3,064	$ 3,184
Impairment of Long-Lived Assets to be Disposed of	0	2
Fair Value, Inputs, Level 3 [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	$ 3,064	$ 3,184