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Business Combinations (Details Textual) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 12 Months Ended
Sep. 09, 2013
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Gennius [Member]        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net   $ 2,345us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= qsii_GenniusMember
   
Business Combinations (Textual) [Abstract]        
Cash paid   2,345us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= qsii_GenniusMember
   
Mirth [Member]        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net     56,222us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= qsii_MirthMember
 
Business Combinations (Textual) [Abstract]        
Accounts receivable acquired         
Purchase price of business acquisition     56,222us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= qsii_MirthMember
 
Contingent consideration     13,307qsii_BusinessAcquisitionCostOfAcquiredEntityContingentConsideration
/ us-gaap_BusinessAcquisitionAxis
= qsii_MirthMember
 
Term for contingent consideration 3 years      
Fair value discount on share-based contingent consideration     (5,239)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
/ us-gaap_BusinessAcquisitionAxis
= qsii_MirthMember
 
Cash paid   $ 0us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= qsii_MirthMember
$ 35,033us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= qsii_MirthMember
$ 0us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= qsii_MirthMember