Accrued Expenses - Additional Information (Detail)	Dec. 31, 2012
Accrued Expenses [Line Items]
Maximum percentage accounted by individual expenses of total current liabilities	5.00%

Maximum Percentage Accounted By Individual Expense Of Total Current Liabilities

No definition available.

Name:	mdrx_MaximumPercentageAccountedByIndividualExpenseOfTotalCurrentLiabilities
Namespace Prefix:	mdrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant