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Commercial Loans Receivables and Allowance for Loan Loss (Changes in the Estimated Allowance for Loan Loss) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
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Sep. 29, 2018 | Sep. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017
Receivables [Abstract] |  |  |  |
Allowance for Loan and Lease Losses, Period Increase (Decrease) | $ 22,000 | $ 20,000 | $ 93,000 | $ 32,000
Changes in the Allowance for Loan Losses on Commercial Loans Receivables |  |  |  |
Balance at beginning of period | 113,000 | 222,000 | 42,000 | 210,000
Loans charged off, net of recoveries | 0 | 0 | 0 | 0
Balance at end of period | $ 135,000 | $ 242,000 | $ 135,000 | $ 242,000

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- Definition Amount of increase (decrease) of allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount, after recoveries, of loans and leases that have been written-off. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- References No definition available. + Details
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