Fair Value Measurements (Book Value and Estimated Fair Value) (Details) - USD ($) $ in Thousands		Mar. 31, 2018	Apr. 01, 2017
Summary of the Fair Value and Carrying Value of Financial Instruments
Commercial loans receivable		$ 16,972
Securitized financings		(64,509)
Mortgage servicing rights		1,410	$ 1,110
Book Value [Member]
Summary of the Fair Value and Carrying Value of Financial Instruments
Investments	[1]	26,586	24,162
Non-marketable equity investments, Fair Value Disclosure	[2]	18,853	17,383
Consumer loans receivable	[3]	94,951	95,801
Interest rate lock commitment derivatives	[4]	(12)	35
Forward loan sale commitment derivatives	[4]	26	(86)
Commercial loans receivable	[5]	16,601	25,833
Securitized financings	[6]	(59,812)	(57,991)
Mortgage servicing rights	[7]	1,410	1,110
Estimated Fair Value [Member]
Summary of the Fair Value and Carrying Value of Financial Instruments
Investments	[1]	26,586	24,162
Non-marketable equity investments, Fair Value Disclosure	[2]	18,853	17,383
Consumer loans receivable	[3]	113,277	121,021
Interest rate lock commitment derivatives	[4]	(12)	35
Forward loan sale commitment derivatives	[4]	26	(86)
Commercial loans receivable	[5]	16,972	25,841
Securitized financings	[6]	(64,509)	(61,270)
Mortgage servicing rights	[7]	$ 1,410	$ 1,110

[1] For Level 1 classified securities, the fair value is based on quoted market prices. The fair value of Level 2 securities is based on other inputs, as further described below.

[2] The fair value approximates book value based on the non-marketable nature of the investments.

[3] Includes consumer loans receivable held for investment, held for sale and construction advances. The fair value of the loans held for investment is based on the discounted value of the remaining principal and interest cash flows. The fair value of the loans held for sale are estimated based on recent GSE mortgage-backed bond prices. The fair value of the construction advances approximates book value and the sales price of these loans.

[4] The fair values are based on changes in GSE mortgage-backed bond prices, and additionally for IRLCs, pull through rates.

[5] The fair value is estimated using market interest rates of comparable loans.

[6] The fair value is estimated using recent public transactions of similar asset-backed securities.

[7] The fair value of the mortgage servicing rights is based on the present value of expected net cash flows related to servicing these loans.