Basis of Presentation and Significant Accounting Policies (Summary of States in Which Company Generates More Than 5% of its Total Revenues) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) Hospital	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Hospital	Jun. 30, 2018 USD ($)
Concentration Risk [Line Items]
Number of hospitals owned or leased | Hospital	26		26
Total net operating revenues before the provision for bad debts, Amount | $	$ 442,170	$ 472,632	$ 884,975	$ 959,452
Illinois [Member]
Concentration Risk [Line Items]
Number of hospitals owned or leased | Hospital	8		8
Total net operating revenues before the provision for bad debts, Amount | $			$ 337,928	$ 373,372
Illinois [Member] | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			39.90%	40.90%
Oregon [Member]
Concentration Risk [Line Items]
Number of hospitals owned or leased | Hospital	1		1
Total net operating revenues before the provision for bad debts, Amount | $			$ 117,469	$ 116,013
Oregon [Member] | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			13.90%	12.70%
California [Member]
Concentration Risk [Line Items]
Number of hospitals owned or leased | Hospital	2		2
Total net operating revenues before the provision for bad debts, Amount | $			$ 89,676	$ 89,972
California [Member] | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			10.60%	9.80%
Kentucky [Member]
Concentration Risk [Line Items]
Number of hospitals owned or leased | Hospital	3		3
Total net operating revenues before the provision for bad debts, Amount | $			$ 55,660	$ 58,115
Kentucky [Member] | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			6.60%	6.40%