Benefit Plans (Narrative) (Details)				3 Months Ended		6 Months Ended
	Sep. 16, 2016 Installment shares	Aug. 18, 2016	Apr. 29, 2016 USD ($)	Jun. 30, 2019 USD ($) Hospital	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, total expense				$ 300,000	$ 4,200,000	$ 800,000	$ 4,300,000
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan net periodic benefit cost				$ 100,000	100,000	100,000	100,000
Number of hospitals | Hospital				1
Accrued benefit obligation liability				$ 1,100,000		1,100,000		$ 1,200,000
Original SERP Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit liability			$ 6,000,000
Defined benefit plan, assets transferred			0
Additional defined benefit plan obligation			$ 0
Amended and Restated SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Current portion of benefit liability				0		0		0
Amended and Restated SERP [Member] | Salaries and Benefits Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan net periodic benefit cost				200,000	$ 100,000	500,000	$ 500,000
Maximum [Member] | Director's Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of annual installments | Installment	15
Common stock shares available for issuance | shares	150,000
Other long-term liabilities [Member] | Amended and Restated SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit liability				3,500,000		3,500,000		3,100,000
QHCCS, LLC Nonqualified Deferred Compensation Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of incentive compensation participants are permitted to defer		100.00%
QHCCS, LLC Nonqualified Deferred Compensation Plan [Member] | Other long-term liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit liability				17,100,000		17,100,000		16,200,000
QHCCS, LLC Nonqualified Deferred Compensation Plan [Member] | Other long-term Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term portion of benefit asset				$ 15,800,000		$ 15,800,000		$ 15,000,000