Acquisitions (Fair Value Of Total Consideration Transferred And Major Class Of Consideration) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Acquired Nsc Centers [Member]
Business Acquisition [Line Items]
Accounts receivable		$ 16,032
Supplies, inventory, prepaid and other current assets		5,357
Investment in unconsolidated affiliates		10,710
Property and equipment		13,347
Goodwill		168,544
Other intangible assets		0
Accounts payable		(2,574)
Other accrued liabilities		(4,609)
Long-term debt		(2,900)
Other long-term liabililties		(422)
Total fair value		203,485
Less: Fair value attributable to noncontrolling interests		71,322
Acquisition date fair value of total consideration transferred		132,163
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Accounts receivable	323	2,180
Supplies, inventory, prepaid and other current assets	143	730
Property and equipment	1,203	4,016
Goodwill	21,940	87,505
Other intangible assets	150	1,750
Accounts payable	(104)	(709)
Other accrued liabilities	(137)	(150)
Long-term debt	0	(2,699)
Total fair value	23,518	92,623
Less: Fair value attributable to noncontrolling interests	9,250	36,286
Acquisition date fair value of total consideration transferred	$ 14,268	$ 56,337