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Fair Value Measurements - Reconciliation of activity for assets and liabilities measured at fair value (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Assets - Beginning balance | $ 11,211 | $ 10,023
Realized (loss) gain included in earnings | 51 | 31
Unrealized gain included in other comprehensive income | 694 | 131
Purchases of available -for-sale securities | 41,557 | 4,030
Principal redemption |  | (3,004)
Assets - Ending balance | 53,513 | 11,211
Liabilities - Beginning balance | 66 | 269
Realized loss (gain) included in earnings | 1,536 | (203)
Liabilities - Ending balance | 1,602 | 66
Other equity investments |  |
Assets - Beginning balance | 10,931 | 9,794
Realized (loss) gain included in earnings |  | (20)
Unrealized gain included in other comprehensive income | 694 | 131
Purchases of available -for-sale securities | 41,557 | 4,030
Principal redemption |  | (3,004)
Assets - Ending balance | 53,182 | 10,931
Mortgage Banking Derivatives |  |
Assets - Beginning balance | 280 | 229
Realized (loss) gain included in earnings | 51 | 51
Assets - Ending balance | 331 | 280
Liabilities - Beginning balance | 66 | 269
Realized loss (gain) included in earnings | 1,536 | (203)
Liabilities - Ending balance | $ 1,602 | $ 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=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) 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)(1a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in income from liability 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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