CONSOLIDATED STATEMENTS OF INCOME UNAUDITED (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Statement [Abstract]
Net sales	$ 1,557,085	$ 1,544,360	$ 1,555,906	$ 1,525,571	$ 1,530,667	$ 1,516,207	$ 1,491,425	$ 1,492,371	$ 6,182,922	$ 6,030,670	$ 6,001,053
Cost of sales	1,197,401	1,198,299	1,219,513	1,190,612	1,196,428	1,182,815	1,164,170	1,151,027	4,805,825	4,694,440	4,566,837
Gross profit	359,684	346,061	336,393	334,959	334,239	333,392	327,255	341,344	1,377,097	1,336,230	1,434,216
Selling, general and administrative expenses	199,902	191,293	192,474	190,166	188,173	190,745	185,919	182,771	773,835	747,608	766,172
Provision for doubtful accounts	25,410	24,255	24,357	24,530	71,326	22,376	20,986	21,942	98,552	136,630	92,495
Settlement, litigation and other related charges	23,103	6,742	19,816	6,013	42,111	36,731	29,361	5,506	55,674	113,709	77,449
Other miscellaneous charges	5,154	6,718	2,332	1,889	65,297	72,782	5,285	5,765	16,093	149,129	28,349
Operating income	106,115	117,053	97,414	112,361	(32,668)	10,758	85,704	125,360	432,943	189,154	469,751
Investment income	10	21	255	296	2,745	4,096	1,105	1,664	582	9,610	9,670
Interest expense	(29,864)	(49,840)	(27,996)	(28,805)	(36,425)	(30,975)	(39,712)	(28,608)	(136,505)	(135,720)	(119,893)
Amortization of discount on convertible notes	(6,226)	(6,107)	(5,989)	(5,873)	(7,117)	(7,615)	(7,473)	(7,331)	(24,195)	(29,536)	(27,977)
Income from continuing operations before income taxes	70,035	61,127	63,684	77,979	(73,465)	(23,736)	39,624	91,085	272,825	33,508	331,551
Income tax expense	31,723	23,343	27,403	28,824	(16,379)	(14,100)	15,879	33,644	111,293	19,044	96,856
Income from continuing operations	38,312	37,784	36,281	49,155	(57,086)	(9,636)	23,745	57,441	161,532	14,464	234,695
Loss from discontinued operations	(7,129)	(9,900)	(37,728)	(19,851)	(8,208)	(93,630)	(12,146)	(6,589)	(74,608)	(120,573)	(22,772)
Net income	31,183	27,884	(1,447)	29,304	(65,294)	(103,266)	11,599	50,852	86,924	(106,109)	211,923
Earnings (loss) per common share - Basic:
Basic earnings per share, continuing operations (per share)	$ 0.34	$ 0.34	$ 0.32	$ 0.43	$ (0.50)	$ (0.08)	$ 0.20	$ 0.49	$ 1.43	$ 0.12	$ 2.00
Discontinued operations	$ (0.06)	$ (0.09)	$ (0.33)	$ (0.17)	$ (0.07)	$ (0.81)	$ (0.10)	$ (0.06)	$ (0.66)	$ (1.04)	$ (0.19)
Net income	$ 0.28	$ 0.25	$ (0.01)	$ 0.26	$ (0.57)	$ (0.89)	$ 0.10	$ 0.43	$ 0.77	$ (0.91)	$ 1.81
Earnings (loss) per common share - Diluted:
Diluted earnings per share, continuing operations plus assumed conversions (per share)	$ 0.34	$ 0.33	$ 0.32	$ 0.43	$ (0.50)	$ (0.08)	$ 0.20	$ 0.49	$ 1.41	$ 0.13	$ 2.00
Diluted earnings per share, discontinued operations (per share)	$ (0.06)	$ (0.09)	$ (0.33)	$ (0.17)	$ (0.07)	$ (0.81)	$ (0.10)	$ (0.06)	$ (0.65)	$ (1.03)	$ (0.19)
Net income	$ 0.27	$ 0.24	$ (0.01)	$ 0.26	$ (0.57)	$ (0.89)	$ 0.10	$ 0.43	$ 0.76	$ (0.91)	$ 1.80
Dividends per common share									$ 0.1525	$ 0.11	$ 0.09
Weighted average number of common shares outstanding:
Common shares (in shares)	111,687	112,729	113,487	114,129	114,685	115,554	117,434	117,763	113,000	116,348	117,094
Diluted shares (in shares)	114,344	114,644	114,701	115,064	114,685	115,554	118,116	118,455	114,781	116,927	117,777
Comprehensive income	$ 32,006	$ 24,002	$ (981)	$ 25,925	$ (67,310)	$ (69,432)	$ 9,310	$ 51,877	$ 80,952	$ (75,555)	$ 196,419