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Fair Value Measurement - Fair Value Measurements of Assets and Liabilities Measured at Fair Value Level 3 (Details) - 12 months ended Dec. 31, 2019 - Significant Unobservable Inputs (Level 3) ¥ in Thousands, $ in Thousands | CNY (¥) | USD ($)
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Fair value reconciliation |  |
Transfer of investments in fair value hierarchy from Level 2 to Level 3 | ¥ 193,105 | $ 27,738
Measurement approach change from measurement alternative to fair value measurement | 35,176 | 5,053
Disposal of portfolio investments | (14,109) | (2,027)
Changes in gains included in investment income (loss) | 5,507 | 791
Ending balance of investments, at fair value | 219,679 | 31,555
Changes in net unrealized gains included in investment income (loss) related to Level 3 investments still held as of December 31, 2019 | ¥ 878 | $ 126

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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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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