1. DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Sources of patient service revenues	$ 101,020	$ 123,033	$ 331,983	$ 306,398
Medicare [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Sources of patient service revenues	14,654	14,474	41,246	45,071
Medicaid [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Sources of patient service revenues	20,340	42,402	82,041	66,569
Managed Care [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Sources of patient service revenues	48,453	50,081	152,883	149,321
Indemnity Self Pay And Other [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Sources of patient service revenues	16,828	15,326	53,343	43,132
Miscellaneous [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Sources of patient service revenues	745	750	2,470	2,304
Total [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Sources of patient service revenues	$ 101,020	$ 123,033	$ 331,983	$ 306,398