CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Patient accounts receivable, allowance for uncollectible accounts	$ 23,900	$ 18,582
Property, building and equipment, accumulated depreciation	47,873	44,683
Intangible assets, accumulated amortization	$ 7,538	$ 6,560
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	40,000,000	40,000,000
Common stock, issued	22,207,136	22,015,211
Treasury stock at cost, shares	4,773,160	4,734,363