Schedule II - Valuation of Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 2,811		$ 2,799		$ 2,553
Charged to Costs and Expenses	3,581		2,223		2,105
Charged to Other Accounts	0		0		0
Other	0		0		0
(Write-offs) net of Recoveries	(2,540)		(2,211)		(1,859)
Balance at End of Period	3,852		2,811		2,799
Professional Liability Reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	19,357		17,251		18,502
Charged to Costs and Expenses	11,385		9,331		4,205
Charged to Other Accounts	(406)	[1]	533	[1]	(334)	[1]
Other	0		0		0
Payments	(7,596)	[2]	(7,758)	[2]	(5,122)	[2]
Balance at End of Period	22,740		19,357		17,251
Workers Compensation Reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	309		346		472
Charged to Costs and Expenses	142		1,323		872
Charged to Other Accounts	0	[1]	0	[1]	0	[1]
Other	311		(257)		509
Payments	(475)	[2]	(1,103)	[2]	(1,507)	[2]
Balance at End of Period	287		309		346
Health Insurance Reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	853		1,003		1,121
Charged to Costs and Expenses	7,207		7,247		8,931
Charged to Other Accounts	0	[1]	0	[1]	0	[1]
Other	0		0		0
Payments	(7,381)	[2]	(7,397)	[2]	(9,049)	[2]
Balance at End of Period	$ 679		$ 853		$ 1,003

[1] As discussed in Note 3 of the Consolidated Financial Statements, the Company has presented the results of certain divestiture and lease termination transactions as discontinued operations. The amounts charged to Other Accounts represent the amounts charged to discontinued operations.

[2] Payments for the Professional Liability Reserve include amounts paid for claims settled during the period as well as payments made under structured arrangements for claims settled in earlier periods.