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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of movement of allowance for uncollectible contract assets (Detail) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Beginning balance	¥ (39,801)	¥ (82,005)
Current year net provision	(87,605)	(214,548)
Current year write-off	87,362	256,752
Transfer out due to disposal of Shanghai Caiyin	(190,491)
Ending balance	0	(39,801)
Current loan products
Beginning balance	(33,912)	(32,571)
Current year net provision	(12,758)	(179,153)
Current year write-off	46,306	177,812
Transfer out due to disposal of Shanghai Caiyin	(140,988)
Ending balance	0	(33,912)
Other online standard loan products
Beginning balance	(2,998)	(42,484)
Current year net provision	(2,852)	(28,957)
Current year write-off	5,382	68,443
Transfer out due to disposal of Shanghai Caiyin	(6,492)
Ending balance	0	(2,998)
Offline and non-standard loan products
Beginning balance	(2,891)	(6,950)
Current year net provision	(71,995)	(6,438)
Current year write-off	35,674	10,497
Transfer out due to disposal of Shanghai Caiyin	(43,011)
Ending balance	¥ 0	¥ (2,891)

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- Definition

Accounts receivable allowance for credit loss transfers.

+ References

No definition available.

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- Definition

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+ References

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- Definition

Amount of accumulated credit loss for right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130533-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
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-URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446

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- Definition

Amount of expense (reversal of expense) for expected credit loss on right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 606
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-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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