Revenue Recognition (Disaggregation of Revenue by Major Service Line) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 160,801	$ 148,871	$ 311,163	$ 294,054
U.S. assisted tax preparation
Disaggregation of Revenue [Line Items]
Revenues	41,226	41,652	74,218	72,756
U.S. royalties
Disaggregation of Revenue [Line Items]
Revenues	7,820	8,062	14,679	15,633
U.S. DIY tax preparation
Disaggregation of Revenue [Line Items]
Revenues	4,541	2,994	7,951	5,775
International
Disaggregation of Revenue [Line Items]
Revenues	44,926	45,497	85,507	84,676
Refund Transfers
Disaggregation of Revenue [Line Items]
Revenues	791	560	2,300	1,984
Emerald Card®
Disaggregation of Revenue [Line Items]
Revenues	8,616	9,478	22,471	23,724
Peace of Mind® Extended Service Plan
Disaggregation of Revenue [Line Items]
Revenues	25,660	24,318	58,497	60,895
Tax Identity Shield®
Disaggregation of Revenue [Line Items]
Revenues	4,648	5,243	9,170	9,984
Interest and fee income on Emerald AdvanceTM
Disaggregation of Revenue [Line Items]
Revenues	485	397	1,039	844
Wave
Disaggregation of Revenue [Line Items]
Revenues	10,902	0	14,527	0
Other
Disaggregation of Revenue [Line Items]
Revenues	$ 11,186	$ 10,670	$ 20,804	$ 17,783