Fair Value Measurements (Book Value and Estimated Fair Value) (Details) - USD ($) $ in Thousands		Sep. 29, 2018	Mar. 31, 2018
Reported Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Equity Method Investments, Fair Value Disclosure	[1]	$ 19,302	$ 18,853
Notes Receivable, Fair Value Disclosure	[2]	93,348	94,951
Interest Rate Lock Commitments Fair Value Disclosure	[3]	(1)	(12)
Forward Commitments Fair Value Disclosure	[3]	(88)	26
Consumer Loans Receivable	[4]	33,829	16,601
Securitized Financings	[5]	56,128	59,812
Servicing Asset at Fair Value, Amount	[6]	1,519	1,410
Reported Value Measurement [Member] | Available-for-sale Securities [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, Fair Value Disclosure	[7]	14,900	16,181
Reported Value Measurement [Member] | Equity Securities [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, Fair Value Disclosure	[7]	12,409	10,405
Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Equity Method Investments, Fair Value Disclosure	[1]	19,302	18,853
Notes Receivable, Fair Value Disclosure	[2]	107,833	113,277
Interest Rate Lock Commitments Fair Value Disclosure	[3]	(1)	(12)
Forward Commitments Fair Value Disclosure	[3]	(88)	26
Consumer Loans Receivable	[4]	31,047	16,972
Securitized Financings	[5]	60,159	64,509
Servicing Asset at Fair Value, Amount	[6]	1,519	1,410
Estimate of Fair Value Measurement [Member] | Available-for-sale Securities [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, Fair Value Disclosure	[7]	14,900	16,181
Estimate of Fair Value Measurement [Member] | Equity Securities [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Investments, Fair Value Disclosure	[7]	$ 12,409	$ 10,405

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

[2] 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.

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

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

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

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

[7] 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.