COMBINED STATEMENTS OF INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
NET SERVICE FEE REVENUE
Service fee revenue, net of contractual allowances and discounts	$ 58,122	$ 46,212	$ 46,321
Provision for bad debts	(2,752)	(2,211)	(2,112)
Net service fee revenue	55,370	44,001	44,209
OPERATING EXPENSES
Cost of operations	38,161	31,557	31,291
Depreciation and amortization	4,607	3,856	3,703
(Gain) loss on sale of equipment	(35)	195	125
Total operating expenses	42,733	35,608	35,119
INCOME FROM OPERATIONS	12,637	8,393	9,090
Net interest expense	245	381	702
NET INCOME	$ 12,392	$ 8,012	$ 8,388