CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Patient accounts receivable, allowance for uncollectible accounts	$ 27,641	$ 29,036
Property, building and equipment, accumulated depreciation	36,614	35,226
Intangible assets, accumulated amortization	$ 11,601	$ 10,968
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	40,000,000	40,000,000
Common stock, issued	22,604,974	22,429,041
Treasury stock at cost, shares	4,881,623	4,828,679