Mortgage Loans Held for Investment and Related Assets (Schedule of Allowance for Impaired Loans) (Details) (USD $) In Thousands	Apr. 30, 2011	Apr. 30, 2010
Based on collateral value method	$ 69,794	$ 68,696
Based on discount cash flow method	11,055	8,915
Total allowance for loans	$ 80,849	$ 77,611

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hrb_AllowanceForLoansLossesAllocatedToImpairedLoansTotal

Namespace Prefix:

hrb

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xbrli:monetaryItemType

Balance Type:

debit

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instant