Consolidating Financial Information (Supplemental Condensed Consolidating Statement of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Cash flows provided by (used in) operating activities	$ 102,814	$ 68,066
Investing cash flows
Additions to property and equipment	(4,547)	(13,477)
Principal receipts from long-term receivables	10,254	10,276
Proceeds from sale of assets	0	137,449
Other	282	964
Cash flows provided by investing activities	5,989	135,212
Fnancing cash flows
Revolving credit borrowings	0	50,000
Revolving credit repayments	0	(50,000)
Payment of debt	(9,915)	(192,483)
Payment of debt modification costs	(1,296)	0
Repurchase of common stock	(24,663)	0
Dividends paid on common stock	(43,170)	0
Restricted cash	(3,122)	(8,158)
Other	4,361	8,510
Intercompany transfers	0	0
Cash flows used in financing activities	(77,805)	(192,131)
Net change in cash and cash equivalents	30,998	11,147
Cash and cash equivalents at beginning of period	64,537	60,691
Cash and cash equivalents at end of period	95,535	71,838
Parent
Condensed Financial Statements, Captions [Line Items]
Cash flows provided by (used in) operating activities	(66,300)	(74,500)
Investing cash flows
Additions to property and equipment	(3,800)	(4,700)
Principal receipts from long-term receivables	0	0
Proceeds from sale of assets	0	0
Other	0	0
Cash flows provided by investing activities	(3,800)	(4,700)
Fnancing cash flows
Revolving credit borrowings		50,000
Revolving credit repayments		(50,000)
Payment of debt	(2,400)	(184,200)
Payment of debt modification costs	(1,300)
Repurchase of common stock	(24,700)
Dividends paid on common stock	(43,200)
Restricted cash	0	0
Other	4,200	7,400
Intercompany transfers	179,700	291,100
Cash flows used in financing activities	112,400	114,200
Net change in cash and cash equivalents	42,300	35,100
Cash and cash equivalents at beginning of period	9,900	9,900
Cash and cash equivalents at end of period	52,200	45,000
Combined Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash flows provided by (used in) operating activities	169,400	142,300
Investing cash flows
Additions to property and equipment	(700)	(8,800)
Principal receipts from long-term receivables	10,300	10,300
Proceeds from sale of assets	0	137,400
Other	300	1,000
Cash flows provided by investing activities	9,800	139,900
Fnancing cash flows
Revolving credit borrowings		0
Revolving credit repayments		0
Payment of debt	(7,500)	(8,200)
Payment of debt modification costs	0
Repurchase of common stock	0
Dividends paid on common stock	0
Restricted cash	(3,100)	(8,200)
Other	100	1,200
Intercompany transfers	(180,100)	(291,100)
Cash flows used in financing activities	(190,600)	(306,300)
Net change in cash and cash equivalents	(11,400)	(24,100)
Cash and cash equivalents at beginning of period	54,000	50,400
Cash and cash equivalents at end of period	42,500	26,200
Combined Non-guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash flows provided by (used in) operating activities	(300)	200
Investing cash flows
Additions to property and equipment	0	0
Principal receipts from long-term receivables	0	0
Proceeds from sale of assets	0	0
Other	0	0
Cash flows provided by investing activities	0	0
Fnancing cash flows
Revolving credit borrowings		0
Revolving credit repayments		0
Payment of debt	0	0
Payment of debt modification costs	0
Repurchase of common stock	0
Dividends paid on common stock	0
Restricted cash	0	0
Other	0	0
Intercompany transfers	400	0
Cash flows used in financing activities	400	0
Net change in cash and cash equivalents	100	200
Cash and cash equivalents at beginning of period	600	400
Cash and cash equivalents at end of period	800	600
Eliminations and Reclassification
Condensed Financial Statements, Captions [Line Items]
Cash flows provided by (used in) operating activities	0	0
Investing cash flows
Additions to property and equipment	0
Principal receipts from long-term receivables	0	0
Proceeds from sale of assets	0	0
Other	0	0
Cash flows provided by investing activities	0	0
Fnancing cash flows
Revolving credit borrowings		0
Revolving credit repayments		0
Payment of debt	0	0
Payment of debt modification costs	0
Repurchase of common stock	0
Dividends paid on common stock	0
Restricted cash	0	0
Other	0	0
Intercompany transfers	0	0
Cash flows used in financing activities	0	0
Net change in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0