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Fair Value Measurements - Mortgage Servicing Rights - Level 3 (Details) - Recurring - Significant Unobservable Inputs (Level 3) - Mortgage servicing rights (MSRs) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Fair value of assets |  |
Balance at beginning of period | $ 2,445 | $ 2,482
Total (losses) or gains (realized/unrealized): Included in earnings | 121 | 275
Total (losses) or gains (realized/unrealized): Included in other comprehensive income | 0 | 0
Purchases | 0 | 0
Sales | 0 | 0
Issues | 170 | 67
Settlements | 0 | 0
Balance at end of period | $ 2,494 | $ 2,274

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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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