Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements Of Operations
Net revenues	$ 449,033	$ 418,366	$ 880,600	$ 828,406
Costs and expenses:
Cost of goods and services	142,300	113,589	266,509	224,515
Operating expenses	102,189	99,673	204,096	198,200
Selling, general and administrative expenses	85,495	84,280	168,374	168,331
Bad debt expense	8,981	6,275	17,612	12,426
Depreciation and amortization expense	29,987	29,397	59,304	58,923
Total costs and expenses	368,952	333,214	715,895	662,395
Operating income	80,081	85,152	164,705	166,011
Other income (expense):
Interest income	200	142	403	235
Interest expense	(9,348)	(9,016)	(18,606)	(17,950)
Total nonoperating income (expense)	(9,148)	(8,874)	(18,203)	(17,715)
Income before income taxes	70,933	76,278	146,502	148,296
Income tax expense	28,168	29,863	57,360	58,245
Net income	$ 42,765	$ 46,415	$ 89,142	$ 90,051
Basic earnings per common share	$ 0.46	$ 0.48	$ 0.96	$ 0.94
Diluted earnings per common share	$ 0.45	$ 0.47	$ 0.94	$ 0.92
Dividends declared per common share	$ 0.20	$ 0.20	$ 0.40	$ 0.20
Weighted average number of common shares outstanding	92,096	96,080	92,535	95,896
Weighted average number of common shares and common share equivalents outstanding	94,989	98,677	95,291	98,165