Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Apr. 30, 2017
Commitments And Contingencies [Line Items]
Standard guarantee accrual amount	$ 3,300	$ 5,700	$ 6,800
Contingent business acquisition obligations	11,906		$ 10,428
Lines of credit, total obligation	41,500
Remaining franchise equity lines of credit-undrawn commitment	12,600
Loss Contingency Accrual [Roll Forward]
Balance, beginning of the period	2,300
Balance, end of the period	2,500	1,700
Scc
Loss Contingency Accrual [Roll Forward]
Balance, beginning of the period	4,500	65,265
Loss provisions	0	235
Payments	(4,500)	(61,000)
Balance, end of the period	$ 0	4,500
Level 3
Commitments And Contingencies [Line Items]
Contingent business acquisition obligations		9,332
H&R Block Emerald Advance® lines of credit
Commitments And Contingencies [Line Items]
Percentage of participation interest required to be purchased at par	90.00%
Principal balance of purchased participation interests	$ 345,000
Refund Advance Pre E-File
Commitments And Contingencies [Line Items]
Estimate of possible loss	10,000
Refund Advance
Commitments And Contingencies [Line Items]
Estimate of possible loss	57,000
Amount paid related to guarantees	400
Loss Contingency Accrual [Roll Forward]
Balance, end of the period	$ 1,600	$ 600