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Fair Value Measurements (Assumptions for Mortgage Servicing Rights) (Details) $ in Thousands | Dec. 29, 2018 USD ($) Loans | Mar. 31, 2018 USD ($) Loans
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Fair Value Disclosures [Abstract] |  |
Number of loans serviced with MSRs | Loans | 4,496 | 4,346
Weighted average servicing fee (basis points) | 0.3159% | 0.3203%
Capitalized servicing multiple | 90.03% | 84.76%
Capitalized servicing rate (basis points) | 0.2844% | 0.2715%
Serviced portfolio with MSRs | $ 546,527 | $ 519,167
Mortgage servicing rights | $ 1,555 | $ 1,410

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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/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=68078379&loc=d3e122625-111746 + Details
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