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Fair Value Measurements - Reconciliation of activity for assets and liabilities measured at fair value (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Assets: |  |  |
Assets - Beginning balance | $ 6,713 | $ 11,211 |
Realized loss included in earnings | (4,577) | 4,933 |
Reclass Level 2 to 3 |  |  | $ 12,000
Principal redemption |  | (198) | (1,500)
Migrated to Level 2 valuation |  | (9,233) |
Assets - Ending balance | 12,636 | 6,713 | 11,211
Liabilities: |  |  |
Liabilities - Beginning balance | 0 | 66 |
Realized gain included in earnings | 0 | (66) |
Liabilities - Ending balance | 0 | 0 | 66
Investment Securities |  |  |
Assets: |  |  |
Assets - Beginning balance | 1,500 | 10,931 |
Realized loss included in earnings | 0 | 0 |
Reclass Level 2 to 3 | 12,000 |  |
Principal redemption | (1,500) | (198) |
Migrated to Level 2 valuation |  | (9,233) |
Assets - Ending balance | 12,000 | 1,500 | 10,931
Liabilities: |  |  |
Liabilities - Beginning balance | 0 | 0 |
Realized gain included in earnings | 0 | 0 |
Liabilities - Ending balance | 0 | 0 | 0
Mortgage Banking Derivatives |  |  |
Assets: |  |  |
Assets - Beginning balance | 5,213 | 280 |
Realized loss included in earnings | (4,577) | 4,933 |
Reclass Level 2 to 3 |  | 0 |
Principal redemption |  | 0 |
Migrated to Level 2 valuation |  |  |
Assets - Ending balance | 636 | 5,213 | 280
Liabilities: |  |  |
Liabilities - Beginning balance | 0 | 66 |
Realized gain included in earnings | 0 | (66) |
Liabilities - Ending balance | $ 0 | $ 0 | $ 66

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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=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy. + 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)(3) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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