BASIS OF PRESENTATION Schedule of Outstanding Accounts Receivable (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	$ 203,497,000us-gaap_AccountsReceivableGross	$ 207,310,000us-gaap_AccountsReceivableGross
Allowance for doubtful accounts	(66,836,000)	(66,500,000)
Net accounts receivable	136,661,000us-gaap_AccountsReceivableNetCurrent	140,810,000us-gaap_AccountsReceivableNetCurrent
Government
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	38,716,000	38,848,000
Commercial
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	147,448,000	153,001,000
Patient
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	17,333,000	15,461,000
0-180 days
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	141,345,000	148,410,000
0-180 days \| Government
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	25,441,000	25,812,000
0-180 days \| Commercial
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	109,452,000	117,699,000
0-180 days \| Patient
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	6,452,000	4,899,000
Over 180 days
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	62,152,000	58,900,000
Over 180 days \| Government
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	13,275,000	13,036,000
Over 180 days \| Commercial
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	37,996,000	35,302,000
Over 180 days \| Patient
Change in Estimate of the Collectability of Accounts Receivable
Gross accounts receivable	$ 10,881,000	$ 10,562,000

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For unclassified balance sheet, amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business.

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For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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