Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net earnings	$ 79,157,000	$ 360,612,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	45,487,000	45,919,000
Amortization of debt issuance costs	1,785,000	1,855,000
Provision for losses on accounts receivable	2,515,000	3,577,000
Loss on extinguishment of debt	5,748,000	3,429,000
Loss on derivatives, net	6,952,000	14,586,000
Loss on sale of property, plant and equipment	13,000	62,000
Earnings on equity investments	(3,228,000)	(3,963,000)
Stock-based compensation expense	6,564,000	22,371,000
Deferred income taxes	2,356,000	10,749,000
Changes in assets and liabilities:
Accounts receivable, net	50,151,000	6,000,000
Inventories	5,852,000	(3,289,000)
Prepaid expenses and other	(24,333,000)	697,000
Other assets	2,834,000	1,484,000
Accounts payable	(34,490,000)	(44,606,000)
Progress billings	(393,000)	10,921,000
Accrued expenses	(10,253,000)	(22,374,000)
Other non-current liabilities	(13,519,000)	14,177,000
Total adjustments	44,041,000	61,595,000
Net cash provided by (used in) operating activities	123,198,000	422,207,000
Cash flows from investing activities:
Additions to property, plant and equipment	(18,127,000)	(16,447,000)
Additions to intangible assets		(7,581,000)
Proceeds from sale of property, plant and equipment	46,000	59,000
Proceeds from sale of available-for-sale securities	1,494,000
Net cash used in investing activities	(16,587,000)	(23,969,000)
Cash flows from financing activities:
Borrowings of long-term debt	610,000,000
Repayments of long-term debt	(709,919,000)	(303,079,000)
Debt issuance costs	(11,580,000)
Repurchases of common stock	(155,817,000)	(58,225,000)
Proceeds from issuance of common stock	5,646,000	41,603,000
Net cash provided (used in) by financing activities	(261,670,000)	(319,701,000)
Effect of exchange rate changes on cash and cash equivalents	158,000	137,000
Net increase (decrease) in cash and cash equivalents	(154,901,000)	78,674,000
Cash and cash equivalents at beginning of period	245,935,000	129,846,000
Cash and cash equivalents at end of period	91,034,000	208,520,000
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	28,567,000	63,894,000
Cash paid during the period for income taxes	72,026,000	188,804,000
Non-cash financing activities:
Stock issued under stock-based compensation plans	$ 3,184,000	$ 1,592,000