Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating activities:
Net income	$ 7,618	$ 67,795
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Non-cash operating items (Note 3)	4,449	(24,055)
Changes in operating assets and liabilities:
Contracts-in-process	(36,126)	(97,156)
Inventories	(6,909)	(12,336)
Long-term receivables		(1,553)
Other current assets and other assets	2,952	5,981
Accounts payable	25,660	9,920
Accrued expenses and other current liabilities	(13,190)	(12,808)
Customer advances	24,376	49,621
Income taxes payable	195	(3,434)
Pension and other postretirement liabilities	(3,146)	(1,656)
Long-term liabilities	(207)	(5,479)
Net cash provided by (used in) operating activities	5,672	(25,160)
Investing activities:
Distribution received from affiliate	375,809
Capital expenditures	(13,974)	(7,406)
Increase in restricted cash	(50,000)	(11,900)
Net cash provided by (used in) investing activities	311,835	(19,306)
Financing activities:
Voting common stock repurchased	(472)
Proceeds from the exercise of stock options	179	334
Cash settlement of restricted stock units	(169)
Funding of withholding taxes on employee cashless stock option exercises	4,900	16,478
Excess tax benefit associated with exercise of stock options	19	1,321
Net cash used in financing activities	(5,343)	(14,823)
Increase (decrease) in cash and cash equivalents	312,164	(59,289)
Cash and cash equivalents - beginning of period	197,114	165,801
Cash and cash equivalents - end of period	$ 509,278	$ 106,512