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Loan Servicing (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Transfers and Servicing of Financial Assets [Abstract] |  |  |
Serviced sold mortgage loans | $ 1,370,000 | $ 1,330,000 | $ 1,370
Serviced sold mortgage loans with recourse | 2,800 | 3,600 | $ 3,000
Servicing fees included in other service income | 900 | $ 900 |
Mortgage Loans Sold with Recourse, Reserve | $ 43 |  |

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- Definition Mortgage Loans Sold with Recourse, Reserve + References No definition available. + Details
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- Definition Principal Amount Outstanding On Sold Loans Servicing Retained + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Principal Amount Outstanding On Sold Loans Servicing Retained With Recourse + References No definition available. + Details
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- Definition Amount of revenue from servicing real estate mortgages, credit cards, and other financial assets held by others. Includes premiums received in lieu of regular servicing fees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13 (d)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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Balance Type: | credit
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- References No definition available. + Details
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