Note 2 - Net Patient Revenues - Revenue Disaggregation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net patient revenues	$ 947,872	$ 932,774	$ 916,742
Revenue, concentration percentage	100.00%	100.00%	100.00%
Inpatient Services [Member]
Net patient revenues	$ 893,201	$ 872,912	$ 853,662
Medicare [Member]
Revenue, concentration percentage	34.00%	35.00%	35.00%
Homecare [Member]
Net patient revenues	$ 54,671	$ 59,862	$ 63,080
Managed Care [Member]
Revenue, concentration percentage	12.00%	12.00%	13.00%
Medicaid [Member]
Revenue, concentration percentage	27.00%	26.00%	26.00%
Private Pay and Other [Member]
Revenue, concentration percentage	27.00%	27.00%	26.00%