Supplemental Guarantor Information Consolidating Condensed Balance Sheets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010
Current Assets
Cash and cash equivalents	$ 25,495	$ 34,924	$ 38,162	$ 48,462
Trade receivables, net	253,569	247,974
Installment receivables, net	2,811	6,671
Inventories, net	217,278	192,761
Deferred income taxes	1,090	1,620
Other current assets	45,944	44,820
Total Current Assets	546,187	528,770
Investment in subsidiaries	0	0
Intercompany advances, net	0	0
Other Assets	42,507	42,647
Other Intangibles	74,841	83,320
Property and Equipment, net	122,720	129,712
Goodwill	465,324	496,605
Total Assets	1,251,579	1,281,054
Current Liabilities
Accounts payable	154,812	148,805
Accrued expenses	124,534	132,595
Accrued income taxes	364	1,495
Short-term debt and current maturities of long-term obligations	830	5,044
Total Current Liabilities	280,540	287,939
Long-Term Debt	258,365	260,440
Other Long-Term Obligations	116,726	106,150
Inercompany advances, net	0	0
Total Shareholders' Equity	595,948	626,525
Total Liabilities and Shareholders' Equity	1,251,579	1,281,054
The Company (Parent) [Member]
Current Assets
Cash and cash equivalents	3,985	3,642	4,706	4,036
Trade receivables, net	80,927	83,522
Installment receivables, net	0	0
Inventories, net	44,803	45,937
Deferred income taxes	421	422
Other current assets	7,453	10,171
Total Current Assets	137,589	143,694
Investment in subsidiaries	1,549,562	1,560,693
Intercompany advances, net	81,474	79,598
Other Assets	40,768	40,813
Other Intangibles	845	821
Property and Equipment, net	41,552	45,459
Goodwill	0	0
Total Assets	1,851,790	1,871,078
Current Liabilities
Accounts payable	79,694	73,948
Accrued expenses	32,579	37,708
Accrued income taxes	124	508
Short-term debt and current maturities of long-term obligations	136	4,210
Total Current Liabilities	112,533	116,374
Long-Term Debt	251,731	252,855
Other Long-Term Obligations	48,735	47,873
Inercompany advances, net	842,843	827,451
Total Shareholders' Equity	595,948	626,525
Total Liabilities and Shareholders' Equity	1,851,790	1,871,078
Combined Guarantor Subsidiaries [Member]
Current Assets
Cash and cash equivalents	1,727	2,104	1,976	2,476
Trade receivables, net	77,842	74,161
Installment receivables, net	1,162	1,180
Inventories, net	56,316	49,336
Deferred income taxes	45	45
Other current assets	7,229	6,517
Total Current Assets	144,321	133,343
Investment in subsidiaries	533,100	524,800
Intercompany advances, net	853,872	846,829
Other Assets	721	698
Other Intangibles	24,698	26,838
Property and Equipment, net	21,070	17,770
Goodwill	56,010	54,894
Total Assets	1,633,792	1,605,172
Current Liabilities
Accounts payable	15,131	18,078
Accrued expenses	22,556	21,038
Accrued income taxes	0	0
Short-term debt and current maturities of long-term obligations	0	4
Total Current Liabilities	37,687	39,120
Long-Term Debt	191	227
Other Long-Term Obligations	7,300	7,312
Inercompany advances, net	211,073	210,005
Total Shareholders' Equity	1,377,541	1,348,508
Total Liabilities and Shareholders' Equity	1,633,792	1,605,172
Combined Non-Guarantor Subsidiaries [Member]
Current Assets
Cash and cash equivalents	19,783	29,178	31,480	41,950
Trade receivables, net	94,800	90,291
Installment receivables, net	1,649	5,491
Inventories, net	118,349	99,006
Deferred income taxes	624	1,153
Other current assets	33,392	33,812
Total Current Assets	268,597	258,931
Investment in subsidiaries	0	0
Intercompany advances, net	207,213	200,157
Other Assets	1,018	1,136
Other Intangibles	49,298	55,661
Property and Equipment, net	60,098	66,483
Goodwill	409,314	441,711
Total Assets	995,538	1,024,079
Current Liabilities
Accounts payable	59,987	56,779
Accrued expenses	71,529	79,529
Accrued income taxes	240	987
Short-term debt and current maturities of long-term obligations	694	830
Total Current Liabilities	132,450	138,125
Long-Term Debt	6,443	7,358
Other Long-Term Obligations	60,691	50,965
Inercompany advances, net	88,643	89,128
Total Shareholders' Equity	707,311	738,503
Total Liabilities and Shareholders' Equity	995,538	1,024,079
Eliminations [Member]
Current Assets
Cash and cash equivalents	0	0	0	0
Trade receivables, net	0	0
Installment receivables, net	0	0
Inventories, net	(2,190)	(1,518)
Deferred income taxes	0	0
Other current assets	(2,130)	(5,680)
Total Current Assets	(4,320)	(7,198)
Investment in subsidiaries	(2,082,662)	(2,085,493)
Intercompany advances, net	(1,142,559)	(1,126,584)
Other Assets	0	0
Other Intangibles	0	0
Property and Equipment, net	0	0
Goodwill	0	0
Total Assets	(3,229,541)	(3,219,275)
Current Liabilities
Accounts payable	0	0
Accrued expenses	(2,130)	(5,680)
Accrued income taxes	0	0
Short-term debt and current maturities of long-term obligations	0	0
Total Current Liabilities	(2,130)	(5,680)
Long-Term Debt	0	0
Other Long-Term Obligations	0	0
Inercompany advances, net	(1,142,559)	(1,126,584)
Total Shareholders' Equity	(2,084,852)	(2,087,011)
Total Liabilities and Shareholders' Equity	$ (3,229,541)	$ (3,219,275)