Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements Of Income [Abstract]
Revenues, net (including revenues, net from related parties of $8,073 and $7,940,respectively)	$ 326,239	$ 272,903
Operating expenses:
Technical and operating (excluding depreciation and amortization shown below and including charges from related parties of $0 and $1,205, respectively)	104,930	90,411
Selling, general and administrative (including charges from related parties of $1,996 and $24,291, respectively)	99,222	86,921
Restructuring credit	(3)	(34)
Depreciation and amortization	25,051	24,926
Total operating expenses	229,200	202,224
Operating income	97,039	70,679
Other income (expense):
Interest expense	(29,797)	(18,350)
Interest income	105	457
Write-off of deferred financing costs	(312)
Miscellaneous, net	12	72
Total non-operating income (expense)	(29,992)	(17,821)
Income from continuing operations before income taxes	67,047	52,858
Income tax expense	(23,970)	(23,136)
Income from continuing operations	43,077	29,722
Income from discontinued operations, net of income taxes	104	96
Net income	$ 43,181	$ 29,818
Basic net income per share:
Income from continuing operations	$ 0.62	$ 0.43
Income from discontinued operations
Net income	$ 0.62	$ 0.43
Diluted net income per share:
Income from continuing operations	$ 0.60	$ 0.43
Income from discontinued operations
Net income	$ 0.60	$ 0.43
Weighted average common shares:
Basic weighted average common shares	69,871	69,161
Diluted weighted average common shares	72,130	69,161