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Mortgage Servicing Rights (Tables) | 6 Months Ended
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Jun. 30, 2019
Transfers and Servicing [Abstract] |
Summary of Changes in Mortgage Servicing Rights | The following table summarizes the changes in mortgage servicing rights ("MSRs"), which are included in other assets on the consolidated balance sheets:
| Three months ended June 30 |  | Six months ended June 30
| 2019 |  | 2018 |  | 2019 |  | 2018
| (in thousands)
Amortized cost: |  |  |  |  |  |  |
Balance at beginning of period | $ | 38,504 |  |  | $ | 37,748 |  |  | $ | 38,573 |  |  | $ | 37,663 |
Originations of mortgage servicing rights | 1,861 |  |  | 1,746 |  |  | 3,086 |  |  | 3,229 |
Amortization | (1,539 | ) |  | (1,600 | ) |  | (2,833 | ) |  | (2,998 | )
Balance at end of period | $ | 38,826 |  |  | $ | 37,894 |  |  | $ | 38,826 |  |  | $ | 37,894 |

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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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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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