Equity Level 4 (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Common Stock, Value, Issued	$ 1,397,000		$ 1,397,000		$ 1,397,000
Stock Issued During Period, Value, Stock Options Exercised			241,000
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			5,923,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			2,289,000
Stock Repurchased During Period, Value			(52,097,000)
Treasury Stock, Shares, Acquired	23,409		574,174
Dividends			(22,709,000)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			6,681,000
Stock Issued During Period, Value, Conversion of Convertible Securities			(1,890,000)
Settlement of Warrants Cash and Accrued			(65,759,000)
Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest			895,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			(240,000)
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	152,000	171,000
Net income	40,384,000	34,362,000	86,376,000	66,648,000
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	40,460,000	34,448,000	86,528,000	66,819,000
Treasury Stock, Value, Acquired, Cost Method	2,300,000		52,100,000
TreasurySharesAcquiredTaxBurden			29,680
TreasurySharesAcquiredValueTaxBurden			2,900,000
Cash dividends per share	$ 0.25	$ 0.06	$ 0.50	$ 0.12
Common Stock, Dividends, Per Share, Declared	$ 0.25
Retained Earnings (Accumulated Deficit)	459,634,000		459,634,000		536,991,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(6,055,000)		(6,055,000)		(6,207,000)
Treasury Stock, Value	205,913,000		205,913,000		242,690,000
Stockholders' Equity Attributable to Noncontrolling Interest	3,139,000		3,139,000		2,849,000
TOTAL EQUITY	252,202,000		252,202,000		292,340,000
Common Stock [Member]
Common Stock, Value, Issued	1,397,000		1,397,000		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
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
Additional Paid-in Capital [Member]
Additional Paid in Capital	0		0		0
Stock Issued During Period, Value, Stock Options Exercised			(1,377,000)
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			307,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			2,289,000
Stock Repurchased During Period, Value			0
Dividends			0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			6,681,000
Stock Issued During Period, Value, Conversion of Convertible Securities			(5,031,000)
Settlement of Warrants Cash and Accrued			(2,869,000)
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
Retained Earnings [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			(22,709,000)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			0
Stock Issued During Period, Value, Conversion of Convertible Securities			(40,311,000)
Settlement of Warrants Cash and Accrued			(101,078,000)
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			86,741,000
Retained Earnings (Accumulated Deficit)	459,634,000		459,634,000		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
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			152,000
Net income			0
Accumulated Other Comprehensive Income (Loss), Net of Tax	(6,055,000)		(6,055,000)		(6,207,000)
Treasury Stock [Member]
Stock Issued During Period, Value, Stock Options Exercised			1,618,000
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			5,616,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			0
Stock Repurchased During Period, Value			(52,097,000)
Dividends			0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments			0
Stock Issued During Period, Value, Conversion of Convertible Securities			43,452,000
Settlement of Warrants Cash and Accrued			38,188,000
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
Treasury Stock, Value	(205,913,000)		(205,913,000)		(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
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			895,000
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders			(240,000)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax
Net income			(365,000)
Stockholders' Equity Attributable to Noncontrolling Interest	$ 3,139,000		$ 3,139,000		$ 2,849,000