Fair Value Measurement Fair Value Of Financial Instruments (Summary Of Carrying Amounts And Estimated Fair Values Of Company's Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Apr. 30, 2013	Jan. 31, 2013	Apr. 30, 2012
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash & cash equivalents	$ 437,404	$ 1,747,584	$ 418,385	$ 1,944,334
Cash and cash equivalents, Estimated Fair Value	437,404	1,747,584
Cash and cash equivalents - restricted, Carrying Amount	44,855	117,837	37,958
Cash and cash equivalents - restricted, Estimated Fair Value	44,855	117,837
Receivables, net - short-term, Carrying Amount	677,221	206,835	949,160
Receivables, net - short-term, Estimated Fair Value	679,590	206,810
Mortgage loans held for investment, less allowance for loan losses of $11,563, $17,256 and $14,314	282,149	338,789	357,887
Loans Receivable, Fair Value Disclosure	195,282	210,858
Investments in available-for-sale securities, Carrying Amount	443,770	486,876	396,312
Investments in available-for-sale securities, Estimated Fair Value	443,770	486,876	397,313
Receivables, net - long-term, Carrying Amount	134,046	125,048
Receivables, net - long-term, Estimated Fair Value	133,623	134,283
Total Portfolio	291,325	350,235	372,139
Deposits, Estimated Fair Value	810,486	934,019
Long-term borrowings, Carrying Amount	906,529	906,680
Long-term borrowings, Estimated Fair Value	953,944	964,630
Cusiness Combination, Contingent Consideration, at Fair Value	10,523	11,277
Business Combination, Contingent Consideration, Liability	10,523	11,277
Level 1
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents, Estimated Fair Value			418,385
Cash and cash equivalents - restricted, Estimated Fair Value			37,958
Receivables, net - short-term, Estimated Fair Value			949,160
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans Receivable, Fair Value Disclosure			217,019
Long-term borrowings, Carrying Amount			906,725
Long-term borrowings, Estimated Fair Value			946,793
Cusiness Combination, Contingent Consideration, at Fair Value			10,871
Business Combination, Contingent Consideration, Liability			10,871
Level 2
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments in available-for-sale securities, Estimated Fair Value			397,313
Level 1 And 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Receivables, net - long-term, Carrying Amount			158,228
Receivables, net - long-term, Estimated Fair Value			158,228
Deposits, Carrying Amount			1,041,942
Deposits, Estimated Fair Value			1,042,282
HRB Bank [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deposits, Carrying Amount	$ 808,008	$ 938,331