Loans and Allowance for Loan Losses - Investment Loans Allowance Activity (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Allowance for loan losses
Beginning Balance	$ 57,968	$ 8,277	$ 7,441	$ 8,320
Cumulative-effect adjustment upon adoption of ASU 2016-13			11,125
Provision for (recoveries of) loan losses	(591)	1,348	39,214	1,866
Charge-offs and sales	(343)	(630)	(812)	(962)
Recoveries	29		95
Recoveries		(181)		(410)
Ending Balance	57,063	8,814	57,063	8,814
Originated SBC loans
Allowance for loan losses
Beginning Balance	10,362		304	11
Cumulative-effect adjustment upon adoption of ASU 2016-13			2,400
Provision for (recoveries of) loan losses	(1,388)	421	6,270	410
Ending Balance	8,974	421	8,974	421
Originated Transitional loans
Allowance for loan losses
Beginning Balance	24,264	222	188	353
Cumulative-effect adjustment upon adoption of ASU 2016-13			1,906
Provision for (recoveries of) loan losses	(4,433)	145	17,737	14
Ending Balance	19,831	367	19,831	367
Acquired loans
Allowance for loan losses
Beginning Balance	10,646	5,041	3,054	5,052
Cumulative-effect adjustment upon adoption of ASU 2016-13			1,878
Provision for (recoveries of) loan losses	1,960	161	7,682	495
Charge-offs and sales	(42)		(50)
Recoveries		(130)		(475)
Ending Balance	12,564	5,072	12,564	5,072
Acquired SBA 7(a) loans
Allowance for loan losses
Beginning Balance	5,622	2,274	2,114	2,318
Cumulative-effect adjustment upon adoption of ASU 2016-13			3,562
Provision for (recoveries of) loan losses	190	601	202	773
Charge-offs and sales	(97)	(630)	(229)	(962)
Recoveries	29		95	65
Recoveries		(51)
Ending Balance	5,744	2,194	5,744	2,194
Originated SBA 7(a) loans
Allowance for loan losses
Beginning Balance	7,074	740	1,781	586
Cumulative-effect adjustment upon adoption of ASU 2016-13			1,379
Provision for (recoveries of) loan losses	2,580	(46)	6,823	108
Charge-offs and sales	(204)		(533)
Ending Balance	9,450	694	9,450	694
Originated Residential Agency loans
Allowance for loan losses
Provision for (recoveries of) loan losses	500	66	500	66
Ending Balance	$ 500	$ 66	$ 500	$ 66

Amount of addition (reduction) in allowance reserve for credit loss from cumulative effect of adoption of new ASU.

No definition available.

Name:	rc_AllowanceForLoanAndLeaseLossesAdjustmentsAdoptionOfAsu
Namespace Prefix:	rc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of reduction of allowance reserve for credit loss arising from sale of loan and lease portfolios and write-offs from both loan receivables and allowance reserve.

+ References

No definition available.

+ Details

Name:	rc_AllowanceForLoanAndLeaseLossesLoansSoldAndWriteOffs
Namespace Prefix:	rc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

+ Details

Name:	us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of other addition (reduction) in allowance reserve for credit loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_AllowanceForLoanAndLeaseLossesAdjustmentsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

Name:	us-gaap_AllowanceForLoanAndLeaseLossesRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707

+ Details

Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

+ Details

Name:	us-gaap_ProvisionForLoanAndLeaseLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rc_OriginatedSbcLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rc_OriginatedTransitionalLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rc_AcquiredLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rc_AcquiredSba7LoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rc_OriginatedSba7LoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rc_OriginatedResidentialAgencyLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: