REVENUE RECOGNITION (Disaggregation of Revenue by Major Service Line) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 519,205	$ 468,384	$ 830,368	$ 762,438
U.S. assisted tax preparation
Disaggregation of Revenue [Line Items]
Total revenues	283,956	256,813	358,174	329,569
U.S. royalties
Disaggregation of Revenue [Line Items]
Total revenues	44,965	42,265	59,644	57,898
U.S. DIY tax preparation
Disaggregation of Revenue [Line Items]
Total revenues	34,089	31,996	42,040	37,771
International
Disaggregation of Revenue [Line Items]
Total revenues	11,804	12,304	97,311	96,980
Refund Transfers
Disaggregation of Revenue [Line Items]
Total revenues	50,494	47,482	52,794	49,466
Emerald Card®
Disaggregation of Revenue [Line Items]
Total revenues	16,657	14,980	39,128	38,704
Peace of Mind® Extended Service Plan
Disaggregation of Revenue [Line Items]
Total revenues	16,954	16,596	75,451	77,491
Tax Identity Shield®
Disaggregation of Revenue [Line Items]
Total revenues	8,138	7,655	17,308	17,639
Interest and fee income on Emerald AdvanceTM
Disaggregation of Revenue [Line Items]
Total revenues	32,741	30,924	33,780	31,768
Wave
Disaggregation of Revenue [Line Items]
Total revenues	11,213	0	25,740	0
Other
Disaggregation of Revenue [Line Items]
Total revenues	$ 8,194	$ 7,369	$ 28,998	$ 25,152