Commitments and Contingencies (Loan Contracts with Off-Balance Sheet Commitments) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016	Apr. 01, 2017
Loan Contracts with Off-Balance Sheet Commitments
Construction loan contract amount	$ 25,913,000		$ 25,913,000		$ 18,031,000
Cumulative advances	(10,349,000)		(10,349,000)		(6,957,000)
Remaining construction contingent commitment	15,564,000		15,564,000		$ 11,074,000
CountryPlace Commitment [Member]
Loss Contingencies [Line Items]
Recognized gain (loss) on the forward sales and whole loan commitments	(227,000)	$ 33,000	(72,000)	$ (11,000)
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 10,000	$ (18,000)	$ (15,000)	$ 10,000