Basis of Presentation (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Date of emergence from bankruptcy proceedings	Nov. 21, 2005
Fresh-start accounting adoption, date	Oct. 01, 2005
Cumulative effect of changes in estimates of long term construction contract on operating income	$ (9,000,000)	$ 48,000,000	$ 59,000,000
Cumulative effect of changes in estimates of long term construction contract on diluted Earnings Per Share	$ (0.17)	$ 0.90	$ 1.15
Cash and cash equivalents	87,370,000	197,114,000	165,801,000	168,205,000
Deferred compensation arrangement expiry date	Dec. 31, 2012
Cash and cash equivalents disposal group		91,000,000
Derivatives foreign exchange contracts disposal group		4,600,000
Research and development expense	20,100,000	34,200,000	19,900,000
Deferred compensation arrangements, vesting period	four years
Common stock multiplier for measurement of initial deferred compensation	$ 9.44
Deferred compensation liabilities		6,400,000
Deferred compensation arrangements, cash payments	6,000,000
Deferred compensation liabilities, discontinued operations		$ 2,700,000
Maximum [Member]
Cash and cash equivalent maturity term	90 days
Billed receivable past due term for consideration	60 days
Minimum [Member]
Billed receivable past due term for consideration	30 days