Relationship with Universal Health Realty Income Trust and Related Party Transactions - Additional Information (Detail)	3 Months Ended					12 Months Ended
	Mar. 31, 2020 USD ($) Hospital Facility SquareFoot Bed Lease	Dec. 31, 2019 USD ($)	Sep. 30, 2019 SquareFoot	Mar. 31, 2019 USD ($) Hospital	Dec. 31, 2013	Dec. 31, 2019 USD ($)	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Net revenues	$ 2,829,667,000			$ 2,804,391,000
Number of hospital facilities | Hospital	3
Number of third party tenant rentable square feet | SquareFoot	26,000
Number of flex lease commitment rentable square feet | SquareFoot	20,000
Chief Executive Officer
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies	$ 28,000,000
Payments to acquire life insurance policies, net	1,100,000					$ 1,100,000
Chief Executive Officer | Trust Owned by CEO
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies	$ 9,000,000
Joint Venture Agreement
Related Party Transaction [Line Items]
Lease initial terms	20 years
Lease renewal period, years	10 years
Number of beds | Bed	108
Number of triple net lease | Lease	5
Number of square foot to be constructed | SquareFoot	80,000
Expected aggregate fee	$ 750,000
Estimated project cost	37,500,000
Estimated initial annual rent	$ 2,700,000
Expected project to begin and be completed year	2020
Minimum
Related Party Transaction [Line Items]
Lease initial terms	5 years
Minimum | Chief Executive Officer
Related Party Transaction [Line Items]
Estimated death benefit proceeds	$ 37,000,000
Maximum
Related Party Transaction [Line Items]
Lease initial terms	10 years
Maximum | Joint Venture Agreement
Related Party Transaction [Line Items]
Expected project to begin and be completed year	2021
Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Trust outstanding shares held, percentage	5.70%
Percentage of advisory fee on average invested real estate assets	0.70%			0.70%		0.70%	0.70%	0.70%
Pre-tax share of income from the Trust	$ 300,000			$ 300,000
Dividends received from the Trust	540,000			531,000
Carrying value of investment in Trust	6,200,000	$ 6,400,000				$ 6,400,000
Market value of investment in Trust	$ 79,400,000	92,400,000				$ 92,400,000
Lease initial terms	10 years
Lease renewal period, years	5 years
Rent expense under operating leases	$ 4,000,000			$ 4,000,000
Notice period on renewal of lease	90 days
Period of rights of refusal to leased facilities	180 days
Number of hospital facilities | Hospital	3			3
Number of free-standing emergency departments to be acquired | Facility	2
Number of square feet to be constructed | SquareFoot			75,000
Percentage of master lease rentable square feet	50.00%
Annual Minimum Rent	$ 644,000
Relationship with Universal Health Realty Income Trust | Minimum
Related Party Transaction [Line Items]
Lease initial terms	13 years
Relationship with Universal Health Realty Income Trust | Minimum | Limited Liability Companies
Related Party Transaction [Line Items]
Non-controlling ownership interests by subsidiaries	95.00%
Relationship with Universal Health Realty Income Trust | Maximum
Related Party Transaction [Line Items]
Lease initial terms	15 years
Relationship with Universal Health Realty Income Trust | Maximum | Limited Liability Companies
Related Party Transaction [Line Items]
Non-controlling ownership interests by subsidiaries	100.00%
Relationship with Universal Health Realty Income Trust | Advisory Fee
Related Party Transaction [Line Items]
Net revenues	$ 1,000,000.0			$ 1,000,000.0
Premier, Inc. | Other (Income) Expense, Net | ASU 2016-01
Related Party Transaction [Line Items]
Unrealized gain	9,000,000
Premier, Inc. | Group Purchasing Organization Agreement | Restricted Stock
Related Party Transaction [Line Items]
Shares vesting period					7 years
Shares vesting period start year					2014
Shares vesting period end year					2020
Market value of retained vested shares	$ 61,000,000	$ 70,000,000