CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Patient accounts receivable, allowance for uncollectible accounts	$ 17,463	$ 14,334
Property, building and equipment, accumulated depreciation	46,022	40,935
Intangible assets, accumulated amortization	$ 6,020	$ 4,518
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	40,000,000	40,000,000
Common stock, issued	22,002,988	21,801,634
Treasury stock at cost, shares	4,733,432	4,693,647