Amount of original merger agreement.

Name:	qsii_AmountOfOriginalMergerAgreement
Namespace Prefix:	qsii
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Business Combinations.

+ Details

Name:	qsii_BusinessCombinationsTextualsAbstract
Namespace Prefix:	qsii
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value adjustment to goodwill and contingent consideration.

+ Details

Name:	qsii_FairValueAdjustmentToGoodwillAndContingentConsideration
Namespace Prefix:	qsii
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period for contingent consideration payable.

+ Details

Name:	qsii_PeriodForContingentConsiderationPayable
Namespace Prefix:	qsii
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph g(1)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph f

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 29, 30, 41, 42, 64

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 65
-Subparagraph a, b

+ Details

Name:	us-gaap_BusinessAcquisitionContingentConsiderationAtFairValue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash paid to acquire the entity.

+ References

+ Details

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaid
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph d

+ Details

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph d

+ Details

Name:	us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph g
-Clause 3

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Business Combinations (Details Textuals) (USD $) In Thousands, except Share data			3 Months Ended				3 Months Ended
	Jun. 30, 2011	Apr. 29, 2011	Jun. 30, 2011 Opus Acquisition [Member]	Mar. 31, 2011 Opus Acquisition [Member]	Mar. 30, 2011 Opus Acquisition [Member]	Feb. 10, 2010 Opus Acquisition [Member]	Jun. 30, 2011 IntraNexus Acquisition [Member]	Apr. 29, 2011 IntraNexus Acquisition [Member]
Business Combinations (Textuals) [Abstract]
Purchase Price of business acquisition	$ 3,279	$ 3,279			$ 856			$ 4,204
Purchase Price of business acquisition	4,204					21,113
Period for contingent consideration payable			2 years				3 years
Fair value adjustment to goodwill and contingent consideration				532		532
Fair value of contingent consideration payable		(800)		12,743		12,048		800
Maximum contingent consideration								1,650
Amount of original merger agreement					$ 12,250
Number of shares to be issued for merger agreement			143,000