Acquisitions (Details) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Aug. 31, 2011
Fair value of consideration transferred:
Cash	$ 247,862	$ 17,391
Debt assumed	84,737	9,657
Notes issued to sellers	10,656	0	10,656
Contingent consideration	22,272	0	22,272
Total fair value of consideration transferred	365,527	27,048
Recognized amounts of identifiable assets acquired liabilities assumed and noncontrolling interests associated with businesses acquired:
Accounts receivable	9,412	1,187
Other current assets	1,056	602
Property and equipment	112,088	22,322
Long-term franchise agreements and contracts	3,269	175
Customer lists	33,978	1,597
Indefinite-lived intangibles	42,283	0
Other intangibles	10,367	0
Accounts payable	(6,183)	0
Accrued liabilities	(1,206)	(2,899)
Noncontrolling interests	(251)	0
Deferred revenue	(6,186)	(541)
Other long-term liabilities	(1,429)	(146)
Deferred taxes	(11,466)	0
Total identifiable net assets	185,732	22,297
Goodwill	179,795	4,751
Payments for acquisitions, net of cash acquired, as reported in Condensed Consolidated Statements of Cash Flows
Cash consideration transferred	247,862	17,391
Payment of contingent consideration	100	0
Payments for acquisitions, net of cash acquired	$ 247,962	$ 17,391