Acquisitions and Divestitures (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended		3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Manufacturing and research facilities item Y
Sale of business
Number of manufacturing and research facilities sold			2
Rent-free lease term			5
Proceeds from the sale of non-core assets, net	$ 1,782	$ 93,185	$ 1,800