Equity Level 4 (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Common Stock, Value, Issued	$ 1,376,000		$ 1,376,000		$ 1,397,000
Stock Issued During Period, Value, Stock Options Exercised			295,000
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			13,341,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			2,315,000
Stock Repurchased During Period, Value			(55,495,000)
Treasury Stock, Shares, Acquired	30,798		604,972
Dividends			(34,356,000)
Stock Repurchased and Retired During Period, Value			0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			8,355,000
Stock Issued During Period, Value, Conversion of Convertible Securities			(1,949,000)
Settlement of Warrants Cash and Accrued			(219,451,000)
Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest			1,193,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			(251,000)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax	76,000	86,000	228,000	257,000
Net income	45,109,000	38,763,000	131,485,000	105,411,000
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	45,185,000	38,849,000	131,713,000	105,668,000
Treasury Stock, Value, Acquired, Cost Method	3,400,000		55,500,000
TreasurySharesAcquiredTaxBurden	10,798		40,478
TreasurySharesAcquiredValueTaxBurden	1,200,000		4,100,000
Treasury Stock, Shares, Retired			702,106
Treasury Stock, Retired, Cost Method, Amount			40,900,000
Cash dividends per share	$ 0.25	$ 0.71	$ 0.75	$ 0.83
Common Stock, Dividends, Per Share, Declared	$ 0.25
Retained Earnings (Accumulated Deficit)	296,172,000		296,172,000		536,991,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(5,979,000)		(5,979,000)		(6,207,000)
Treasury Stock, Value	157,187,000		157,187,000		242,690,000
Stockholders' Equity Attributable to Noncontrolling Interest	3,668,000		3,668,000		2,849,000
TOTAL EQUITY	138,050,000		138,050,000		292,340,000
WarrantSettlement1 [Member]
Shares Issued to Settle Warrants	37,959
Common Stock [Member]
Common Stock, Value, Issued	1,376,000		1,376,000		1,397,000
Stock Issued During Period, Value, Stock Options Exercised			0
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			0
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			0
Stock Repurchased During Period, Value			0
Dividends			0
Stock Repurchased and Retired During Period, Value			(21,000)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			0
Stock Issued During Period, Value, Conversion of Convertible Securities			0
Settlement of Warrants Cash and Accrued			0
Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax			0
Net income			0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Additional Paid-in Capital [Member]
Additional Paid in Capital	0		0		0
Stock Issued During Period, Value, Stock Options Exercised			(1,658,000)
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			6,007,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			2,315,000
Stock Repurchased During Period, Value			0
Dividends			0
Stock Repurchased and Retired During Period, Value			0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			8,355,000
Stock Issued During Period, Value, Conversion of Convertible Securities			(8,425,000)
Settlement of Warrants Cash and Accrued			(6,594,000)
Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax			0
Net income			0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Retained Earnings [Member]
Stock Issued During Period, Value, Stock Options Exercised			0
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			(744,000)
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			0
Stock Repurchased During Period, Value			0
Dividends			(34,356,000)
Stock Repurchased and Retired During Period, Value			(40,894,000)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			0
Stock Issued During Period, Value, Conversion of Convertible Securities			(40,394,000)
Settlement of Warrants Cash and Accrued			(256,039,000)
Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax			0
Net income			131,608,000
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Retained Earnings (Accumulated Deficit)	296,172,000		296,172,000		536,991,000
Accumulated Other Comprehensive Income (Loss) [Member]
Stock Issued During Period, Value, Stock Options Exercised			0
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			0
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			0
Stock Repurchased During Period, Value			0
Dividends			0
Stock Repurchased and Retired During Period, Value			0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			0
Stock Issued During Period, Value, Conversion of Convertible Securities			0
Settlement of Warrants Cash and Accrued			0
Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax			228,000
Net income			0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss), Net of Tax	(5,979,000)		(5,979,000)		(6,207,000)
Treasury Stock [Member]
Stock Issued During Period, Value, Stock Options Exercised			1,953,000
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			8,078,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			0
Stock Repurchased During Period, Value			(55,495,000)
Dividends			0
Stock Repurchased and Retired During Period, Value			40,915,000
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			0
Stock Issued During Period, Value, Conversion of Convertible Securities			46,870,000
Settlement of Warrants Cash and Accrued			43,182,000
Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest			0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			0
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax			0
Net income			0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Treasury Stock, Value	(157,187,000)		(157,187,000)		(242,690,000)
Noncontrolling Interest [Member]
Stock Issued During Period, Value, Stock Options Exercised			0
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			0
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			0
Stock Repurchased During Period, Value			0
Dividends			0
Stock Repurchased and Retired During Period, Value			0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			0
Stock Issued During Period, Value, Conversion of Convertible Securities			0
Settlement of Warrants Cash and Accrued			0
Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest			1,193,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			(251,000)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax			0
Net income			(123,000)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Stockholders' Equity Attributable to Noncontrolling Interest	$ 3,668,000		$ 3,668,000		$ 2,849,000