Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		150 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Mar. 31, 2014 Argentina Fire	Mar. 31, 2014 Litigation	Mar. 31, 2014 Government Contract Billing Matter	Jun. 30, 2013 State of Massachusetts Assessment	Jun. 30, 2012 State of Massachusetts Assessment	Nov. 30, 2011 Italy Fire item	Mar. 31, 2014 Italy Fire item
Commitments and Contingencies
Loss contingencies, reasonably possible loss exposure in excess of the amount currently accrued		$ 42,700
Total revenue billed and recorded from October 1, 2001 through December 31, 2013			77,000
Aggregate amount of assessed tax including tax, interest and penalties				$ 4,120	$ 8,191
Number of customer lawsuits						3
Number of customer lawsuits settled							3
Maximum facility revenue as a percentage of consolidated revenues	0.50%