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Leases - Summary of Operating Leases (Details) ¥ in Thousands	12 Months Ended
	Dec. 31, 2019 CNY (¥)
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities, Operating cash flows from operating leases	¥ 85,717
Operating leases, Right-of-use assets obtained in exchange for new lease obligations:	¥ 126,099
Operating leases, Weighted average remaining lease term	12 years 2 months 12 days
Operating leases, Weighted average discount rate	6.70%

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (c)
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-Publisher FASB
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-Section 50
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Weighted average discount rate for operating lease calculated at point in time.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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