Commitments and Contingencies (Loan Contracts with Off-Balance Sheet Commitments) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Apr. 01, 2017
Loan Contracts with Off-Balance Sheet Commitments
Construction loan contract amount	$ 27,093	$ 18,031
Cumulative advances	(11,088)	(6,957)
Remaining construction contingent commitment	$ 16,005	$ 11,074

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.

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-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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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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