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Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Apr. 01, 2017
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Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |
Servicing Asset at Fair Value, Amount |  | $ 1,310 | $ 1,110
Recurring [Member] | US Treasury and Government [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (648) |
Recurring [Member] | Mortgage-backed securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (6,456) |
Recurring [Member] | Securities issued by states and political subdivisions [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (6,301) |
Recurring [Member] | Corporate debt securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (1,681) |
Recurring [Member] | Marketable equity securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (9,865) |
Recurring [Member] | Interest rate lock commitments [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [2] | (21) |
Recurring [Member] | Forward loan sale commitments [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [2] | (159) |
Recurring [Member] | Mortgage servicing rights [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [3] | (1,310) |
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |
Construction Loan |  | 10,350 |
Inventory Finance Receivable |  | 31,249 |
Loans Held for Investment Fair Value Disclosure |  | 95,136 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |
Construction Loan |  | 0 |
Inventory Finance Receivable |  | 0 |
Loans Held for Investment Fair Value Disclosure |  | 0 |
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | US Treasury and Government [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Mortgage-backed securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Securities issued by states and political subdivisions [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Corporate debt securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Marketable equity securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (9,865) |
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Interest rate lock commitments [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [2] | 0 |
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Forward loan sale commitments [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [2] | 0 |
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Mortgage servicing rights [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [3] | 0 |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |
Construction Loan |  | 0 |
Inventory Finance Receivable |  | 0 |
Loans Held for Investment Fair Value Disclosure |  | 0 |
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | US Treasury and Government [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (648) |
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Mortgage-backed securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (6,456) |
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Securities issued by states and political subdivisions [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (6,301) |
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Corporate debt securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | (1,681) |
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Marketable equity securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Interest rate lock commitments [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [2] | 0 |
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Forward loan sale commitments [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [2] | 0 |
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Mortgage servicing rights [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [3] | 0 |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |
Construction Loan |  | 10,350 |
Inventory Finance Receivable |  | 31,249 |
Loans Held for Investment Fair Value Disclosure |  | 95,136 |
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | US Treasury and Government [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Mortgage-backed securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Securities issued by states and political subdivisions [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Corporate debt securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Marketable equity securities [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [1] | 0 |
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate lock commitments [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [2] | (21) |
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Forward loan sale commitments [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [2] | (159) |
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Mortgage servicing rights [Member] |  |  |
Summary of Assets Measured at Fair Value on a Recurring Basis |  |  |
Assets fair value | [3] | $ (1,310) |
[1] | Unrealized gains or losses on investments are recorded in accumulated other comprehensive income (loss) at each measurement date
[2] | Gains or losses on derivatives are recognized in current period earnings through cost of sales.
[3] | Changes in the fair value of mortgage servicing rights are recognized in the current period earnings through net revenue.

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- Definition Loans held for investment. + References No definition available. + Details
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition This element represents the carrying value of a short-term real estate loan to finance building costs. The funds are disbursed as needed or in accordance with a prearranged plan; generally, a portion of the funds is disbursed at inception and the remainder as construction progresses. The money is repaid on completion of the project, usually from the proceeds of a mortgage loan. The rate is normally higher than the prime rate, and there is usually an origination fee. The effective yield on these loans tends to be high, and the lender has a security interest in the real property. Note that there are separate concepts for the current and noncurrent portions of long-term construction loans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | instant

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