Commitments and Contingencies (Loan Contracts with Off-Balance Sheet Commitments) (Details) - USD ($)	3 Months Ended	9 Months Ended
Dec. 30, 2017	Dec. 31, 2016	Dec. 30, 2017	Dec. 31, 2016	Apr. 01, 2017
Loan Contracts with Off-Balance Sheet Commitments
Construction loan contract amount	$ 26,647,000		$ 26,647,000		$ 18,031,000
Cumulative advances	(12,407,000)		(12,407,000)		(6,957,000)
Remaining construction contingent commitment	14,240,000		14,240,000		$ 11,074,000
CountryPlace Commitment [Member]
Loss Contingencies [Line Items]
Recognized gain (loss) on the forward sales and whole loan commitments	384,000	$ 150,000	312,000	$ 139,000
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (31,000)	$ (17,000)	$ (46,000)	$ (7,000)

Loan contracts with off balance sheet commitments.

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Remaining construction contingent commitment.

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Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

+ References

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- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959

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- Definition

Amount before allowance of loans issued to build, improve or remodel a residential home. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(a)(2),(b))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

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