CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Patient accounts receivable, allowance for uncollectible accounts	$ 28,617	$ 26,712
Property, building and equipment, accumulated depreciation	41,017	38,907
Intangible assets, accumulated amortization	$ 9,097	$ 8,496
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	40,000,000	40,000,000
Common stock, issued	22,370,384	22,224,423
Treasury stock at cost, shares	4,814,522	4,776,560