Litigation And Other Related Contingencies (Details) $ in Millions	May 06, 2019	Apr. 30, 2020 USD ($)	Apr. 30, 2019 USD ($)	Sep. 30, 2016 loan	Sep. 28, 2012 loan	May 31, 2012 loan
Commitments and Contingencies Disclosure [Abstract]
Accrued obligations under indemnifications | $		$ 1.6	$ 1.9
Loss Contingencies [Line Items]
Original loans collateralized						7,500
Number of loans sold to the trust					96
Loans sold to trust, with claims of breach of contract and indemnity				649
SCC
Loss Contingencies [Line Items]
Principal assets of SCC | $		$ 276.0
Free File Litigation
Loss Contingencies [Line Items]
Eligibility period prior to filing complaint	4 years