CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net revenues	$ 496,163	$ 449,033	$ 997,041	$ 880,600
Costs and expenses:
Cost of goods and services	160,247	142,300	323,776	266,509
Operating expenses	111,877	102,189	226,859	204,096
Selling, general and administrative expenses	89,604	85,495	183,000	168,374
Bad debt expense	12,923	8,981	22,941	17,612
Depreciation and amortization expense	33,040	29,987	65,592	59,304
Total costs and expenses	407,691	368,952	822,168	715,895
Operating income	88,472	80,081	174,873	164,705
Other income (expense):
Interest income	95	200	209	403
Interest expense	(10,457)	(9,348)	(20,781)	(18,606)
Total Other income (expense)	(10,362)	(9,148)	(20,572)	(18,203)
Income before income taxes	78,110	70,933	154,301	146,502
Income tax expense	30,206	28,168	59,997	57,360
Net income	$ 47,904	$ 42,765	$ 94,304	$ 89,142
Basic earnings per common share	$ 0.58	$ 0.46	$ 1.13	$ 0.96
Diluted earnings per common share	$ 0.56	$ 0.45	$ 1.10	$ 0.94
Dividends declared per common share	$ 0.20	$ 0.20	$ 0.40	$ 0.40
Weighted average number of common shares outstanding	82,806	92,096	83,285	92,535
Weighted average number of common shares and common share equivalents outstanding	85,158	94,989	85,584	95,291