ACCOUNTS RECEIVABLE, NET - Ageing Categories (Details) - USD ($) $ in Thousands	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
Accounts Receivable, net
0-60 Days	$ 108,453				$ 110,053
61-120 Days	32,331				24,513
121-180 Days	13,880				9,398
Over 180 Days	19,584				10,775
Accounts receivable, net	174,248	$ 165,787	$ 159,471	$ 146,060	154,739	$ 149,952	$ 150,276	$ 139,756
Patient Care
Accounts Receivable, net
Accounts receivable, net	153,771				137,703
Patient Care | Non-Medicare
Accounts Receivable, net
0-60 Days	64,012				68,038
61-120 Days	19,314				14,829
121-180 Days	8,462				5,748
Over 180 Days	11,041				6,206
Accounts receivable, net	102,829				94,821
Patient Care | Commercial insurance
Accounts Receivable, net
0-60 Days	45,929				51,315
61-120 Days	13,093				10,239
121-180 Days	5,666				3,918
Over 180 Days	7,880				4,664
Accounts receivable, net	72,568				70,136
Patient Care | Private pay
Accounts Receivable, net
0-60 Days	1,542				1,859
61-120 Days	879				939
121-180 Days	460				381
Over 180 Days	411				152
Accounts receivable, net	3,292				3,331
Patient Care | Medicaid
Accounts Receivable, net
0-60 Days	12,441				10,936
61-120 Days	4,246				2,871
121-180 Days	1,832				1,143
Over 180 Days	2,109				1,078
Accounts receivable, net	20,628				16,028
Patient Care | VA
Accounts Receivable, net
0-60 Days	4,100				3,928
61-120 Days	1,096				780
121-180 Days	504				306
Over 180 Days	641				312
Accounts receivable, net	6,341				5,326
Patient Care | Medicare
Accounts Receivable, net
0-60 Days	31,450				31,404
61-120 Days	7,704				5,523
121-180 Days	3,973				2,538
Over 180 Days	7,815				3,417
Accounts receivable, net	50,942				42,882
Products and Services
Accounts Receivable, net
Accounts receivable, net	20,477				17,036
Products and Services | Trade accounts receivable
Accounts Receivable, net
0-60 Days	12,991				10,611
61-120 Days	5,313				4,161
121-180 Days	1,445				1,112
Over 180 Days	728				1,152
Accounts receivable, net	$ 20,477				$ 17,036