Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Net income	$ 194,323us-gaap_ProfitLoss	$ 151,852us-gaap_ProfitLoss
Other comprehensive income (loss):
Unrealized derivative gains on cash flow hedges	4,132	3,745
Amortization of terminated hedge	(84)	(84)
Foreign currency translation adjustment	(418)	0
Other comprehensive income before tax	3,630	3,661
Income tax expense related to items of other comprehensive income	1,497us-gaap_OtherComprehensiveIncomeLossTax	1,354us-gaap_OtherComprehensiveIncomeLossTax
Total other comprehensive income, net of tax	2,133	2,307
Comprehensive income	196,456	154,159
Less: Comprehensive income attributable to noncontrolling interests	20,024	13,774
Comprehensive income attributable to UHS	$ 176,432us-gaap_ComprehensiveIncomeNetOfTax	$ 140,385us-gaap_ComprehensiveIncomeNetOfTax

Comprehensive Income Net of Tax Attributable to Noncontrolling Interest and Redeemable Noncontrolling Interest

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Comprehensive Income Net of Tax Including Portion Attributable to Noncontrolling Interest and Redeemable Noncontrolling Interest

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount before tax, after reclassification adjustments of other comprehensive income (loss).

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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