Consumer Loans Receivable (Consumer Loan Receivables by Segment and Credit Quality Indicator) (Details) $ in Thousands	9 Months Ended
	Dec. 31, 2016 USD ($) Credit_Quality_Indicator	Apr. 02, 2016 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sensitivity Analysis, Change in Prepayment Rate	$ 1,200
Sensitivity Analysis, Change in Default Rate	5,000
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	96,502	$ 90,402
Chattel Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	54,616	54,874
Chattel Loans Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 1,540	1,655
Chattel Loans Range One [Member] | Minimum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	0
Chattel Loans Range One [Member] | Maximum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	619
Chattel Loans Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 25,523	26,018
Chattel Loans Range Two [Member] | Minimum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	620
Chattel Loans Range Two [Member] | Maximum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	719
Chattel Loans Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 27,064	26,699
Chattel Loans Range Three [Member] | Minimum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	720
Chattel Loans Range Four [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 489	502
Conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	24,707	16,932
Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 461	430
Conforming Mortgages Range One [Member] | Minimum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	0
Conforming Mortgages Range One [Member] | Maximum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	619
Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 16,817	10,630
Conforming Mortgages Range Two [Member] | Minimum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	620
Conforming Mortgages Range Two [Member] | Maximum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	719
Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 7,429	5,872
Conforming Mortgages Range Three [Member] | Minimum [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Asset class credit quality indicator | Credit_Quality_Indicator	720
Non-conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 17,167	18,583
Non Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 1,918	2,065
Non Conforming Mortgages Range One [Member] | Minimum [Member]
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 [Member] | Maximum [Member]
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 [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 9,768	10,319
Non Conforming Mortgages Range Two [Member] | Minimum [Member]
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 [Member] | Maximum [Member]
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 [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 5,178	5,892
Non Conforming Mortgages Range Three [Member] | Minimum [Member]
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 [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 303	307
Other Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	12	13
Loans Securitized 2005 [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	29,045	31,858
Loans Securitized 2005 [Member] | Chattel Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	26,026	28,721
Loans Securitized 2005 [Member] | Chattel Loans Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	725	776
Loans Securitized 2005 [Member] | Chattel Loans Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	12,070	13,139
Loans Securitized 2005 [Member] | Chattel Loans Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	13,179	14,751
Loans Securitized 2005 [Member] | Chattel Loans Range Four [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	52	55
Loans Securitized 2005 [Member] | Conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Securitized 2005 [Member] | Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Securitized 2005 [Member] | Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Securitized 2005 [Member] | Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Securitized 2005 [Member] | Non-conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	3,019	3,137
Loans Securitized 2005 [Member] | Non Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	86	88
Loans Securitized 2005 [Member] | Non Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	1,321	1,365
Loans Securitized 2005 [Member] | Non Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	1,612	1,684
Loans Securitized 2005 [Member] | Other Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Securitized 2007 [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	25,591	28,309
Loans Securitized 2007 [Member] | Chattel Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	17,031	19,052
Loans Securitized 2007 [Member] | Chattel Loans Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	467	543
Loans Securitized 2007 [Member] | Chattel Loans Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	8,307	9,100
Loans Securitized 2007 [Member] | Chattel Loans Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	8,257	9,409
Loans Securitized 2007 [Member] | Conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Securitized 2007 [Member] | Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Securitized 2007 [Member] | Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Securitized 2007 [Member] | Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Securitized 2007 [Member] | Non-conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	8,560	9,257
Loans Securitized 2007 [Member] | Non Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	487	585
Loans Securitized 2007 [Member] | Non Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	4,996	5,290
Loans Securitized 2007 [Member] | Non Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	3,077	3,382
Loans Securitized 2007 [Member] | Other Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Loans Unsecuritized [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	16,895	14,904
Loans Unsecuritized [Member] | Chattel Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	8,919	6,790
Loans Unsecuritized [Member] | Chattel Loans Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	309	336
Loans Unsecuritized [Member] | Chattel Loans Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	4,513	3,683
Loans Unsecuritized [Member] | Chattel Loans Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	3,660	2,324
Loans Unsecuritized [Member] | Chattel Loans Range Four [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	437	447
Loans Unsecuritized [Member] | Conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	2,376	1,912
Loans Unsecuritized [Member] | Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	162	164
Loans Unsecuritized [Member] | Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	1,966	1,428
Loans Unsecuritized [Member] | Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	248	320
Loans Unsecuritized [Member] | Non-conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	5,588	6,189
Loans Unsecuritized [Member] | Non Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	1,345	1,392
Loans Unsecuritized [Member] | Non Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	3,451	3,664
Loans Unsecuritized [Member] | Non Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	489	826
Loans Unsecuritized [Member] | Non Conforming Mortgages Range Four [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	303	307
Loans Unsecuritized [Member] | Other Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	12	13
Construction Advances [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	7,512	6,566
Construction Advances [Member] | Chattel Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances [Member] | Chattel Loans Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances [Member] | Chattel Loans Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances [Member] | Chattel Loans Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances [Member] | Conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	7,512	6,566
Construction Advances [Member] | Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	95
Construction Advances [Member] | Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	5,050	3,355
Construction Advances [Member] | Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	2,462	3,116
Construction Advances [Member] | Non-conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances [Member] | Non Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances [Member] | Non Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances [Member] | Non Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Construction Advances [Member] | Other Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	17,459	8,765
Consumer Loans Held For Sale [Member] | Chattel Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	2,640	311
Consumer Loans Held For Sale [Member] | Chattel Loans Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	39	0
Consumer Loans Held For Sale [Member] | Chattel Loans Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	633	96
Consumer Loans Held For Sale [Member] | Chattel Loans Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	1,968	215
Consumer Loans Held For Sale [Member] | Conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	14,819	8,454
Consumer Loans Held For Sale [Member] | Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	299	171
Consumer Loans Held For Sale [Member] | Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	9,801	5,847
Consumer Loans Held For Sale [Member] | Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	4,719	2,436
Consumer Loans Held For Sale [Member] | Non-conforming Mortgages [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale [Member] | Non Conforming Mortgages Range One [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale [Member] | Non Conforming Mortgages Range Two [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale [Member] | Non Conforming Mortgages Range Three [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	0	0
Consumer Loans Held For Sale [Member] | Other Loans [Member]
Gross Consumer Loans Receivable by Portfolio Segment and Credit Risk Score
Consumer loans receivable	$ 0	$ 0