Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Patient accounts receivable, allowance for uncollectible accounts	$ 10,909	$ 10,692
Property, building and equipment, accumulated depreciation	30,895	28,073
Intangible assets, accumulated amortization	$ 2,712	$ 2,325
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	21,534,814	21,374,264
Common stock, shares outstanding	18,191,813	18,298,659
Treasury stock at cost, shares	3,343,001	3,075,605