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Loan Servicing (Tables) | 6 Months Ended
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Jun. 30, 2018
Transfers and Servicing of Financial Assets [Abstract] |
Activity For MSRs And Related Valuation Allowance | Activity for MSRs and the related valuation allowance follows:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(In thousands) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Mortgage servicing rights: |  |  |  |  |  |  |  |
Carrying amount, net, beginning of period |  | $ | 9,969 |  |  | $ | 9,321 |  |  | $ | 9,688 |  |  | $ | 9,266 |
Additions |  | 448 |  |  | 521 |  |  | 776 |  |  | 875 |
Amortization |  | (417 | ) |  | (407 | ) |  | (769 | ) |  | (765 | )
Changes in valuation allowance |  | 77 |  |  | 41 |  |  | 382 |  |  | 100 |
Carrying amount, net, end of period |  | $ | 10,077 |  |  | $ | 9,476 |  |  | $ | 10,077 |  |  | $ | 9,476 |
Valuation allowance: |  |  |  |  |  |  |  |
Beginning of period |  | $ | 325 |  |  | $ | 676 |  |  | $ | 630 |  |  | $ | 735 |
Changes in valuation allowance |  | (77 | ) |  | (41 | ) |  | (382 | ) |  | (100 | )
End of period |  | $ | 248 |  |  | $ | 635 |  |  | $ | 248 |  |  | $ | 635 |

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- Definition Tabular disclosure of activity in the balance of servicing assets subsequently measured at amortized cost. Includes, but is not limited to, beginning and ending balances, additions, disposals, and amortization. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122739-111746 + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TransfersAndServicingOfFinancialAssetsAbstract
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration