Condensed Consolidating Financial Information Cash Flow (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Dec. 31, 2009
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Productive Assets			$ 683	$ 406
Non-controlling interest - contributions			(1,193)	(156)
ProceedsFromInsuranceRecoveries			884
Payments of Dividends, Noncontrolling Interest			(251)	(181)
Cash and Cash Equivalents, Period Increase (Decrease)			(116,859)	(13,092)
Proceeds from Stock Options Exercised			295	336
Excess Tax Benefit from Share-based Compensation, Financing Activities			2,315	798
Payments of Debt Issuance Costs			(1,997)	0
Settlement of Warrants			(219,451)	0
Net Cash Provided by (Used in) Operating Activities			146,829	169,129
Payments of Dividends			(34,356)	(37,095)
Premiums on life insurance			(1,661)	(1,357)
Payments for Repurchase of Common Stock			(55,495)	(92,077)
Net Cash Provided by (Used in) Financing Activities			(224,214)	(152,429)
Net Cash Provided by (Used in) Investing Activities			(39,474)	(29,792)
Repayment of debt borrowings			(229,467)	24,366
Proceeds from debt borrowings			313,000	0
Cash and Cash Equivalents, at Carrying Value	17,021	167,953	17,021	167,953	133,880	181,045
Capital expenditures	(6,219)	(6,965)	(18,203)	(19,661)
Payments to Acquire Intangible Assets			(177)	(180)
Business Acquisitions			(21,000)	(9,000)
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Productive Assets			571	(395)
Non-controlling interest - contributions			(1,193)	(156)
ProceedsFromInsuranceRecoveries			884
Payments of Dividends, Noncontrolling Interest			(251)	(181)
Cash and Cash Equivalents, Period Increase (Decrease)			(26,344)	1,698
Proceeds from Stock Options Exercised			0	0
Excess Tax Benefit from Share-based Compensation, Financing Activities			0	0
Payments of Debt Issuance Costs			(903)
Settlement of Warrants			0
Net Cash Provided by (Used in) Operating Activities			(147,568)	18,267
Payments of Dividends			0	0
Premiums on life insurance			0	0
Payments for Repurchase of Common Stock			0	0
Net Cash Provided by (Used in) Financing Activities			155,039	(25)
Net Cash Provided by (Used in) Investing Activities			(33,815)	(16,544)
Repayment of debt borrowings			(158,000)	0
Proceeds from debt borrowings			313,000
Cash and Cash Equivalents, at Carrying Value	7,762	13,697	7,762	13,697	34,106	11,999
Capital expenditures			(14,116)	(16,762)
Payments to Acquire Intangible Assets			(154)	(177)
Business Acquisitions			21,000	0
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Productive Assets			0
Non-controlling interest - contributions				0
ProceedsFromInsuranceRecoveries			0
Payments of Dividends, Noncontrolling Interest			0	0
Cash and Cash Equivalents, Period Increase (Decrease)			(9,889)	(64,771)
Proceeds from Stock Options Exercised			295	336
Excess Tax Benefit from Share-based Compensation, Financing Activities			2,315	798
Payments of Debt Issuance Costs			0
Settlement of Warrants			(219,451)
Net Cash Provided by (Used in) Operating Activities			296,803	63,267
Payments of Dividends			(34,356)	(37,095)
Premiums on life insurance			0	0
Payments for Repurchase of Common Stock			(55,495)	(92,077)
Net Cash Provided by (Used in) Financing Activities			(306,692)	(128,038)
Net Cash Provided by (Used in) Investing Activities			0	0
Repayment of debt borrowings			0	0
Proceeds from debt borrowings			0
Cash and Cash Equivalents, at Carrying Value	1,273	9,227	1,273	9,227	11,162	73,998
Capital expenditures			0	0
Payments to Acquire Intangible Assets			0	0
Business Acquisitions			0	0
Subsidiaries Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Productive Assets			112	(11)
Non-controlling interest - contributions				0
ProceedsFromInsuranceRecoveries			0
Payments of Dividends, Noncontrolling Interest			0	0
Cash and Cash Equivalents, Period Increase (Decrease)			(80,626)	49,981
Proceeds from Stock Options Exercised			0	0
Excess Tax Benefit from Share-based Compensation, Financing Activities			0	0
Payments of Debt Issuance Costs			(1,094)
Settlement of Warrants			0
Net Cash Provided by (Used in) Operating Activities			(2,406)	87,595
Payments of Dividends			0	0
Premiums on life insurance			(1,661)	(1,357)
Payments for Repurchase of Common Stock			0	0
Net Cash Provided by (Used in) Financing Activities			(72,561)	(24,366)
Net Cash Provided by (Used in) Investing Activities			(5,659)	(13,248)
Repayment of debt borrowings			(71,467)	24,366
Proceeds from debt borrowings			0
Cash and Cash Equivalents, at Carrying Value	7,986	145,029	7,986	145,029	88,612	95,048
Capital expenditures			(4,087)	(2,899)
Payments to Acquire Intangible Assets			(23)	(3)
Business Acquisitions			0	(9,000)
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Productive Assets			0	0
Non-controlling interest - contributions			0	0
ProceedsFromInsuranceRecoveries			0
Payments of Dividends, Noncontrolling Interest			0	0
Cash and Cash Equivalents, Period Increase (Decrease)			0	0
Proceeds from Stock Options Exercised			0	0
Excess Tax Benefit from Share-based Compensation, Financing Activities			0	0
Settlement of Warrants			0
Net Cash Provided by (Used in) Operating Activities			0	0
Payments of Dividends			0	0
Premiums on life insurance			0	0
Payments for Repurchase of Common Stock			0	0
Net Cash Provided by (Used in) Financing Activities			0	0
Net Cash Provided by (Used in) Investing Activities			0	0
Repayment of debt borrowings			0	0
Proceeds from debt borrowings			0
Cash and Cash Equivalents, at Carrying Value	0	0	0	0	0	0
Capital expenditures			0	0
Payments to Acquire Intangible Assets			0	0
Business Acquisitions			$ 0	$ 0