Financial Information for Subsidiary Guarantor and Subsidiary Non- Guarantor - Supplemental Condensed Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 148,917	$ 93,836	$ 74,808	$ 97,793
Trust cash	13,203	16,446
Accounts receivable, net	460,424	413,813
Deferred income taxes receivable	20,561	10,068
Prepaid assets	39,839	37,042
Deferred expenses	37,809	19,985
Other current assets	44,383	30,596
Total current assets	765,136	621,786
Property and equipment, net	352,657	350,855
GOODWILL	1,812,246	1,762,635		1,629,396
INTANGIBLES, net	303,764	333,147
OTHER ASSETS	218,262	159,095
TOTAL ASSETS	3,452,065	3,227,518
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) CURRENT LIABILITIES:
Accounts payable	79,307	79,439
Accrued expenses	377,012	323,436
Current maturities of long-term debt	25,125	15,425
Total current liabilities	481,444	418,300
LONG-TERM OBLIGATIONS, less current maturities	3,998,812	3,500,940
DEFERRED INCOME TAXES	144,268	121,521
OTHER LONG-TERM LIABILITIES	119,442	83,170
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	(1,291,901)	(896,413)	(2,568,012)	(2,543,500)
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT	3,452,065	3,227,518
Parent / Issuer [Member]
CURRENT ASSETS:
Cash and cash equivalents	62,178	10,503	2,110
Deferred income taxes receivable	3,260	73,709
Prepaid assets	2,928	3,222
Other current assets	12,654	5,089
Total current assets	81,020	92,523
Property and equipment, net	69,774	73,105
INVESTMENT IN SUBSIDIARIES	1,406,266	1,460,108
OTHER ASSETS	128,997	98,673
TOTAL ASSETS	1,686,057	1,724,409
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) CURRENT LIABILITIES:
Accounts payable	3,820	5,001
Intercompany payables	439,833	572,554
Accrued expenses	(1,721)	70,680
Current maturities of long-term debt	8,677	2,354
Total current liabilities	450,609	650,589
LONG-TERM OBLIGATIONS, less current maturities	2,425,462	1,890,134
DEFERRED INCOME TAXES	29,215	22,766
OTHER LONG-TERM LIABILITIES	69,672	57,333
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	(1,291,901)	(896,413)
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT	1,683,057	1,724,409
Guarantor Subsidiaries [Member]
CURRENT ASSETS:
Trust cash	13,203	16,446
Accounts receivable, net	69,714	50,480
Intercompany receivables	449,658	573,280
Deferred income taxes receivable	11,092	13,034
Prepaid assets	28,431	25,232
Deferred expenses	26,404	17,339
Other current assets	288,751	288,434
Total current assets	887,253	984,745
Property and equipment, net	242,503	243,170
INVESTMENT IN SUBSIDIARIES	392,648	351,329
GOODWILL	1,637,411	1,586,988
INTANGIBLES, net	265,146	283,807
OTHER ASSETS	86,855	58,378
TOTAL ASSETS	3,511,816	3,508,417
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) CURRENT LIABILITIES:
Accounts payable	57,598	68,317
Accrued expenses	317,563	260,490
Current maturities of long-term debt	16,448	13,071
Total current liabilities	391,609	341,878
LONG-TERM OBLIGATIONS, less current maturities	1,570,350	1,610,806
DEFERRED INCOME TAXES	97,465	84,918
OTHER LONG-TERM LIABILITIES	47,688	16,299
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	1,404,704	1,454,516
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT	3,511,816	3,508,417
Non-Guarantor Subsidiaries [Member]
CURRENT ASSETS:
Cash and cash equivalents	91,927	89,572	84,232	102,385
Accounts receivable, net	390,710	363,333
Deferred income taxes receivable	6,209	462
Prepaid assets	8,480	8,588
Deferred expenses	11,405	2,146
Other current assets	(257,022)	(262,927)
Total current assets	251,709	201,174
Property and equipment, net	40,380	34,580
GOODWILL	174,835	175,647
INTANGIBLES, net	38,618	49,340
OTHER ASSETS	2,410	2,044
TOTAL ASSETS	507,952	462,785
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) CURRENT LIABILITIES:
Accounts payable	23,077	12,360
Intercompany payables	9,825	726
Accrued expenses	61,170	69,403
Total current liabilities	94,072	82,489
DEFERRED INCOME TAXES	17,588	13,837
OTHER LONG-TERM LIABILITIES	2,082	9,538
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	394,210	356,921
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT	507,952	462,785
Eliminations and Consolidating Entries [Member]
CURRENT ASSETS:
Cash and cash equivalents	(5,188)	(6,239)	(11,534)	(4,592)
Intercompany receivables	(449,658)	(573,280)
Deferred income taxes receivable		(77,137)
Total current assets	(454,846)	(656,656)
INVESTMENT IN SUBSIDIARIES	(1,798,914)	(1,811,437)
TOTAL ASSETS	(2,253,760)	(2,468,093)
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT) CURRENT LIABILITIES:
Accounts payable	(5,188)	(6,239)
Intercompany payables	(449,658)	(573,280)
Accrued expenses		(77,137)
Total current liabilities	(454,846)	(656,656)
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	(1,798,914)	(1,811,437)
TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT	$ (2,253,760)	$ (2,468,093)