Revenue Recognition (Disaggregation of Revenue by Major Service Line) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 148,871	$ 140,854	$ 294,054	$ 278,656
U.S. assisted tax preparation
Disaggregation of Revenue [Line Items]
Revenues	41,652	36,665	72,756	66,628
U.S. royalties
Disaggregation of Revenue [Line Items]
Revenues	8,062	7,008	15,633	13,975
U.S. DIY tax preparation
Disaggregation of Revenue [Line Items]
Revenues	2,994	4,263	5,775	7,489
International revenues
Disaggregation of Revenue [Line Items]
Revenues	45,497	47,934	84,676	88,351
Revenues from Refund Transfers
Disaggregation of Revenue [Line Items]
Revenues	560	1,135	1,984	3,951
Revenues from Emerald Card®
Disaggregation of Revenue [Line Items]
Revenues	9,478	9,180	23,724	24,167
Revenues from Peace of Mind® Extended Service Plan
Disaggregation of Revenue [Line Items]
Revenues	24,318	24,585	60,895	56,528
Revenues from Tax Identity Shield®
Disaggregation of Revenue [Line Items]
Revenues	5,243	257	9,984	511
Interest and fee income on Emerald Advance
Disaggregation of Revenue [Line Items]
Revenues	397	594	844	1,258
Other
Disaggregation of Revenue [Line Items]
Revenues	$ 10,670	$ 9,233	$ 17,783	$ 15,798