CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Patient accounts receivable, allowance for uncollectible accounts	$ 26,712	$ 18,582
Property, building and equipment, accumulated depreciation	38,907	44,683
Intangible assets, accumulated amortization	$ 8,496	$ 6,560
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	22,224,423	22,015,211
Treasury stock at cost, shares	4,776,560	4,734,363