Lease Commitments - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2014 Facility	Dec. 31, 2013	Dec. 31, 2012
Leases Disclosure [Line Items]
Number of hospital facilities	3uhs_NumberOfHospitalFacilities
Additional capital lease obligations incurred	$ 16,000,000us-gaap_CapitalLeaseObligationsIncurred	$ 0us-gaap_CapitalLeaseObligationsIncurred	$ 0us-gaap_CapitalLeaseObligationsIncurred

The increase during the period in capital lease obligations due to entering into new capital leases.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

Name:	us-gaap_CapitalLeaseObligationsIncurred
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration