Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities:
Net income	$ 20,123	$ 82,100
Adjustments to reconcile net income to net cash provided by operating activities:
Non-cash operating items (Note 3)	64,190	(6,197)
Changes in operating assets and liabilities:
Contracts-in-process	(65,086)	(66,135)
Inventories	(14,953)	13,506
Long-term receivables	(1,557)	(4,432)
Other current assets and other assets	5,296	(165)
Accounts payable	(4,726)	8,693
Accrued expenses and other current liabilities	2,178	(2,646)
Customer advances	71,643	16,012
Income taxes payable	(4,091)	1,110
Pension and other postretirement liabilities	(15,609)	(7,032)
Long-term liabilities	9,409	3,551
Net cash provided by operating activities	66,817	38,365
Investing activities:
Capital expenditures	(28,192)	(40,624)
Proceeds from sale of net assets	61,482
Increase in restricted cash	(11,275)
Net cash provided by (used in) investing activities	22,015	(40,624)
Financing activities:
Proceeds from the exercise of stock options	447	9,262
Funding of withholding taxes on employee cashless stock option exercises	(16,905)	(779)
Excess tax benefit associated with exercise of stock options	1,095
Net cash (used in) provided by financing activities	(15,363)	8,483
Increase in cash and cash equivalents	73,469	6,224
Cash and cash equivalents - beginning of period	165,801	168,205
Cash and cash equivalents - end of period	$ 239,270	$ 174,429