Consumer Loans Receivable (Consumer Loan Receivables by Segment and Credit Quality Indicator) (Details) $ in Thousands	Sep. 28, 2019 USD ($) Credit_Quality_Indicator	Mar. 30, 2019 USD ($)
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 91,575	$ 89,126
Home-only Loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	46,038	49,621
Home-only loans range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 855	912
Home-only loans range one | Minimum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	0
Home-only loans range one | Maximum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	619
Home-only loans range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 23,606	24,710
Home-only loans range two | Minimum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	620
Home-only loans range two | Maximum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	719
Home-only loans range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 21,149	23,562
Home-only loans range three | Minimum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	720
Home-only loans range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 428	437
Conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	33,264	26,523
Conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 83	543
Conforming mortgages range one | Minimum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	0
Conforming mortgages range one | Maximum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	619
Conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 19,655	17,148
Conforming mortgages range two | Minimum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	620
Conforming mortgages range two | Maximum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	719
Conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 13,223	8,832
Conforming mortgages range three | Minimum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	720
Conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 303
Non-conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	12,241	12,976
Non-conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 1,353	1,413
Non-conforming mortgages range one | Minimum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	0
Non-conforming mortgages range one | Maximum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	619
Non-conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 7,340	7,689
Non-conforming mortgages range two | Minimum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	620
Non-conforming mortgages range two | Maximum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	719
Non-conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 3,366	3,660
Non-conforming mortgages range three | Minimum
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	720
Non-conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 182	214
Other loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	32	6
Securitized 2005
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	18,390	20,296
Securitized 2005 | Home-only Loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	16,379	17,986
Securitized 2005 | Home-only loans range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	374	401
Securitized 2005 | Home-only loans range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	7,615	8,448
Securitized 2005 | Home-only loans range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	8,344	9,090
Securitized 2005 | Home-only loans range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	46	47
Securitized 2005 | Conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2005 | Conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2005 | Conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2005 | Conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2005 | Conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0
Securitized 2005 | Non-conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	2,011	2,310
Securitized 2005 | Non-conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	76	78
Securitized 2005 | Non-conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	811	994
Securitized 2005 | Non-conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	1,124	1,238
Securitized 2005 | Non-conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2005 | Other loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2007
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	17,006	18,065
Securitized 2007 | Home-only Loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	10,752	11,660
Securitized 2007 | Home-only loans range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	228	245
Securitized 2007 | Home-only loans range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	5,629	5,996
Securitized 2007 | Home-only loans range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	4,895	5,419
Securitized 2007 | Home-only loans range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2007 | Conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2007 | Conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2007 | Conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2007 | Conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2007 | Conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0
Securitized 2007 | Non-conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	6,254	6,405
Securitized 2007 | Non-conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	327	344
Securitized 2007 | Non-conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	3,915	4,008
Securitized 2007 | Non-conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	2,012	2,053
Securitized 2007 | Non-conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Securitized 2007 | Other loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Unsecuritized
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	25,117	26,594
Unsecuritized | Home-only Loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	18,658	19,358
Unsecuritized | Home-only loans range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	253	266
Unsecuritized | Home-only loans range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	10,275	10,266
Unsecuritized | Home-only loans range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	7,748	8,436
Unsecuritized | Home-only loans range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	382	390
Unsecuritized | Conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	2,451	2,969
Unsecuritized | Conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	83	83
Unsecuritized | Conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	1,550	2,202
Unsecuritized | Conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	818	684
Unsecuritized | Conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0
Unsecuritized | Non-conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	3,976	4,261
Unsecuritized | Non-conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	950	991
Unsecuritized | Non-conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	2,614	2,687
Unsecuritized | Non-conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	230	369
Unsecuritized | Non-conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	182	214
Unsecuritized | Other loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	32	6
Construction Advances
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	14,261	12,883
Construction Advances | Home-only Loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Home-only loans range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Home-only loans range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Home-only loans range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Home-only loans range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	14,261	12,883
Construction Advances | Conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	9,616	8,061
Construction Advances | Conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	4,645	4,822
Construction Advances | Conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0
Construction Advances | Non-conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Non-conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Non-conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Non-conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Non-conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances | Other loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	16,801	11,288
Consumer Loans Held For Sale | Home-only Loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	249	617
Consumer Loans Held For Sale | Home-only loans range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale | Home-only loans range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	87	0
Consumer Loans Held For Sale | Home-only loans range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	162	617
Consumer Loans Held For Sale | Home-only loans range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale | Conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	16,552	10,671
Consumer Loans Held For Sale | Conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	460
Consumer Loans Held For Sale | Conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	8,489	6,885
Consumer Loans Held For Sale | Conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	7,760	3,326
Consumer Loans Held For Sale | Conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	303
Consumer Loans Held For Sale | Non-conforming mortgages
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale | Non-conforming mortgages range one
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale | Non-conforming mortgages range two
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale | Non-conforming mortgages range three
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale | Non-conforming mortgages range four
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale | Other loans
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 0	$ 0