Fair Value Measurement (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jun. 30, 2012
Fair Value Measurements (Textual)
Fair Value Adjustments	$ 0

Increase decrease in fair value adjustments on assets and liabilities carried at fair value.

No definition available.

Name:	qsii_IncreaseDecreaseInFairValueAdjustmentsOnAssetsAndLiabilitiesCarriedAtFairValue
Namespace Prefix:	qsii_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration