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Mortgage Servicing Rights (Tables) | 9 Months Ended
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Sep. 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 September 30 |  | Nine months ended September 30
| 2019 |  | 2018 |  | 2019 |  | 2018
| (in thousands)
Amortized cost: |  |  |  |  |  |  |
Balance at beginning of period | $ | 38,826 |  |  | $ | 37,894 |  |  | $ | 38,573 |  |  | $ | 37,663 |
Originations of mortgage servicing rights | 2,499 |  |  | 2,018 |  |  | 5,585 |  |  | 5,247 |
Amortization | (1,970 | ) |  | (1,684 | ) |  | (4,803 | ) |  | (4,682 | )
Balance at end of period | $ | 39,355 |  |  | $ | 38,228 |  |  | $ | 39,355 |  |  | $ | 38,228 |

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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_
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Balance Type: | na
Period Type: | duration

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