Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Operating activities:
Net income	$ 421,091		$ 127,174		$ 487,341
Income from discontinued operations, net of tax	(320,649)		(74,566)		(99,752)
Adjustments to reconcile net income to net cash used in operating activities:
Non-cash operating items (Note 2)	(21,053)		(71,435)		(412,473)
Changes in operating assets and liabilities:
Long-term receivables	20,700		(3,145)		(5,964)
Other current assets and other assets	(1,992)		10,144		(7,839)
Accounts payable			41		(212)
Accrued expenses and other current liabilities	(5,447)		1,161		1,302
Customer advances					2,504
Income taxes payable	(22,043)		(8,282)		(1,653)
Pension and other postretirement liabilities	6,169		(1,099)		(395)
Long-term liabilities	(110,663)		(834)		983
Net cash used in operating activities - continuing operations	(33,887)		(20,841)		(36,158)
Net cash (used in) provided by operating activities - discontinued operations	(66,605)		78,835		78,107
Net cash (used in) provided by operating activities	(100,492)		57,994		41,949
Investing activities:
Distributions received from affiliate	420,199
Proceeds from sale of investments, net	1,694
Capital expenditures	(4)		(350)		(18,679)
Proceeds from sale of net assets			61,482
Decrease in restricted cash			625
Investments in and advances to affiliates			(10,379)
Net cash provided by investing activities - continuing operations	421,889		51,378		(18,679)
Net cash used in investing activities - discontinued operations	(107,778)		(55,415)		(35,378)
Cash proceeds from the Sale, net of transaction costs of $35,219	932,661
Net cash provided by investing activities	1,246,772		(4,037)		(54,057)
Financing activities:
Special cash distribution paid	(892,147)
Cash dividend paid	(417,606)
Voting common stock repurchased	(1,664)		(7,928)
Proceeds from the exercise of stock options	1,635		1,058		13,995
Cash settlement of restricted stock units	(169)
Funding of withholding taxes on employee cashless stock option exercises	(6,992)		(16,972)		(2,477)
Excess tax benefit associated with exercise of stock options	16,919	[1]	1,198	[1]	412	[1]
Net cash (used in) provided by financing activities - continuing operations	(1,300,024)		(22,644)		11,930
Net cash provided by (used in) financing activities - discontinued operations	44,000				(2,226)
Net cash (used in) provided by financing activities	(1,256,024)		(22,644)		9,704
(Decrease) increase in cash and cash equivalents	(109,744)		31,313		(2,404)
Cash and cash equivalents - beginning of period	197,114		165,801		168,205
Cash and cash equivalents - end of period	$ 87,370		$ 197,114		$ 165,801

[1] The Company uses the with-and-without approach of determining when excess tax benefits from equity compensation have been realized.