Real Property Interests - Schedule of Maturities of Finance Lease Liabilities and Cell Site Leasehold Interest Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finance Lease and Cell Site Leasehold Interest
2021	$ 10,042
2022	7,796
2023	7,644
2024	4,398
2025	2,701
Thereafter	3,432
Total lease payments	36,013
Less amounts representing future interest	(2,168)
Total liability	33,845
Less current portion	(9,920)	$ (5,749)
Finance lease liabilities	23,925	10,451
Less current portion	(5,749)	(8,379)
Cell site leasehold interest liabilities	11,813	$ 8,462
Cell Site Leasehold Interests
Finance Lease and Cell Site Leasehold Interest
2021	5,820
2022	3,095
2023	8,384
2024	424
2025	234
Thereafter	347
Total lease payments	18,304
Less amounts representing future interest	(742)
Total liability	17,562
Less current portion	(5,749)
Cell site leasehold interest liabilities	$ 11,813

Cell site leasehold interest liability.

No definition available.

Name:	radi_CellSiteLeaseHoldInterestLiability
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilities
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities, current.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilitiesCurrent
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities payments due.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilitiesPaymentsDue
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities payments due after year five.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilitiesPaymentsDueAfterYearFive
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities payments due next twelve months.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilitiesPaymentsDueNextTwelveMonths
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities payments due year five.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilitiesPaymentsDueYearFive
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities payments due year four.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilitiesPaymentsDueYearFour
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities payments due year three.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilitiesPaymentsDueYearThree
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities payments due year two.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilitiesPaymentsDueYearTwo
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cell site leasehold interest liabilities undiscounted excess amount.

+ References

No definition available.

+ Details

Name:	radi_CellSiteLeaseholdInterestLiabilitiesUndiscountedExcessAmount
Namespace Prefix:	radi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

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

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

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

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent.

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payments for finance lease.

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease.

+ References

+ Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=radi_CellSiteLeaseholdInterestsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: