Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Company's assets and liabilities measured at fair value using significant unobservable inputs (Level 3)
Fair Value Measurement with Unobservable Input Reconciliation Recurring Basis Assets Value	$ 0	$ 0	$ 7,706
Transfer out of Level 3 (Note 5)		-12743
Goodwill adjustment (Note 5)		532
Recognized loss		(6)
Acquisition (Note 5)	6,104
Earnout payments	(463)	(253)
Fair Value Adjustments, net		789
Proceeds from sale at par		(7,700)
Fair Value Measurement with Unobservable Input Reconciliation Recurring Basis Liability Value	$ 6,556	$ 915	$ 12,590

Fair value measurement with unobservable input reconciliation recurring basis assets value.

No definition available.

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Period Type:	instant

- Definition

Fair value measurement with unobservable input reconciliation recurring basis liability value.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Fair value measurement with unobservable inputs reconciliation recurring basis liability acquisition.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Proceeds from sale at par.

+ References

No definition available.

+ Details

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Namespace Prefix:	qsii_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Recognized loss.

+ References

No definition available.

+ Details

Name:	qsii_RecognizedLoss
Namespace Prefix:	qsii_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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- Definition

Disclosures concerning the reasons for transfers out of Level 3 of the fair value hierarchy.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

+ Details

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- Definition

This element represents purchases, sales, issuances, and settlements (net) which have taken place during the period in relation to liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Settlements that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Purchase price allocation adjustment for allocation not yet complete at the prior year end.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Subparagraph e

-Paragraph 45

-Clause 7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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