Label	Element	Value
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation	$ 4,000,000.0
New Jersey Imaging Network, LLC [Member]
Business Combination, Step Acquisition, Cash Acquired	rdnt_BusinessCombinationStepAcquisitionCashAcquired	$ 5,400,000
Equity Method Investment, Ownership Percentage	us-gaap_EquityMethodInvestmentOwnershipPercentage	49.00%
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	$ 39,500,000
Business Combination, Step Acquisition, Adjustment Of Investment Balance	rdnt_BusinessCombinationStepAcquisitionAdjustmentOfInvestmentBalance	44,300,000
Total Radnet, Inc.'s Equity [Member]
Noncontrolling Interest, Special Distribution	rdnt_NoncontrollingInterestSpecialDistribution	3,000,000.0
Noncontrolling Interest [Member]
Noncontrolling Interest, Special Distribution	rdnt_NoncontrollingInterestSpecialDistribution	9,200,000
Medical Arts Radiology [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member]
Business Combination, Liabilities Arising from Contingencies, Amount Recognized	us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized	700,000
Business Combination, Consideration Transferred, Liabilities Incurred	us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred	2,700,000
Business Combination, Consideration Transferred	us-gaap_BusinessCombinationConsiderationTransferred1	50,900,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	8,000,000.0
Ventura County Imaging Group, LLC [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	4,300,000
Hudson Valley Radiology Associates [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member]
Business Combination, Liabilities Arising from Contingencies, Amount Recognized	us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized	700,000
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	$ 6,000,000.0
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued	440,207

Business Combination, Step Acquisition, Adjustment Of Investment Balance

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- Definition

Business Combination, Step Acquisition, Cash Acquired

+ References

No definition available.

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- Definition

Noncontrolling Interest, Special Distribution

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No definition available.

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- Definition

Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 30
-Section 30
-Paragraph 8
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-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477

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- Definition

Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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- Definition

Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
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- Definition

The amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and were recognized by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472

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- Definition

Amount of lease obligation assumed in business combination.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472

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- Definition

The amount of property, plant, and equipment recognized as of the acquisition date.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
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-URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472

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- Definition

In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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-Publisher FASB
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-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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