Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Statement [Abstract]
Revenues, net (including revenues, net from related parties of $32,195, $31,885 and $29,203, respectively)	$ 1,352,577	$ 1,187,741	$ 1,078,300
Operating expenses
Technical and operating (excluding depreciation and amortization shown below and including charges from related parties of $620, $5,040 and $3,971, respectively)	507,436	425,961	366,093
Selling, general and administrative (including charges (credits) from related parties of $(206), $57,004 and $100,230, respectively)	396,926	335,656	328,134
Restructuring credit	(3)	(240)	(2,218)
Depreciation and amortization	85,380	99,848	106,455
Total Operating Expenses	989,739	861,225	798,464
Operating Income	362,838	326,516	279,836
Other income (expense)
Interest expense	(127,778)	(95,870)	(75,800)
Interest income	502	1,074	2,388
Write-off Of Deferred Financing Costs	(1,862)	(6,247)	0
Loss On Extinguishment Of Debt	(10,774)	(14,726)	0
Miscellaneous, net	(652)	(137)	(162)
Total nonoperating income (expense)	(140,564)	(115,906)	(73,574)
Income from continuing operations before income taxes	222,274	210,610	206,262
Income Tax Expense	(86,058)	(84,248)	(88,073)
Income From Continuing Operations	136,216	126,362	118,189
Income (loss) from discontinued operations, net of income taxes	314	92	(38,090)
Net Income	$ 136,530	$ 126,454	$ 80,099
Basic net income (loss) per share
Income From Continuing Operations	$ 1.94	$ 1.82	$ 1.71
Income (Loss) From Discontinued Operations	$ 0.00	$ 0.00	$ (0.55)
Net Income	$ 1.94	$ 1.83	$ 1.16
Diluted net income (loss) per share
Income From Continuing Operations	$ 1.89	$ 1.79	$ 1.71
Income (loss) from discontinued operations	$ 0.00	$ 0.00	$ (0.55)
Net Income	$ 1.89	$ 1.79	$ 1.16
Weighted average common shares
Basic Weighted Average Common Shares	70,374,000	69,283,000	69,161,000
Diluted Weighted Average Common Shares	72,236,000	70,731,000	69,161,000