Fair Value Measurements (Assumptions for Mortgage Servicing Rights) (Details) $ in Thousands	Dec. 28, 2019 USD ($) Loans	Mar. 30, 2019 USD ($) Loans
Fair Value Disclosures [Abstract]
Number of loans serviced with MSRs \| Loans	4,632	4,557
Weighted average servicing fee	0.3112%	0.3159%
Capitalized servicing multiple	70.53%	77.97%
Capitalized servicing rate	0.2195%	0.2463%
Serviced portfolio with MSRs	$ 575,313	$ 556,934
Mortgage servicing rights	$ 1,263	$ 1,372

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746

Name:	us-gaap_ServicingAssetAtFairValueAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant