Investments - Financing Receivables by Origination Year (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Asset Management
Origination Year
Total	$ 13,586	$ 13,586
Asset Management \| Level 1
Origination Year
Total	13,586	13,586
Asset Management \| Corporate loans
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	13,586	13,586
Total	13,586	13,586
Asset Management \| Corporate loans \| Level 1
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	13,586	13,586
Total	13,586	13,586
Asset Management \| Corporate loans \| Level 2
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Asset Management \| Corporate loans \| Level 3
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Asset Management \| Corporate loans \| Level 4
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Asset Management \| Corporate loans \| Level 5
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Insurance Solutions
Origination Year
Year one	28,935	32,801
Year two	39,212	38,882
Year three	37,708	25,781
Year four	21,698	22,315
Year five	39,053	54,950
Prior	32,191	15,916
Total	198,797	190,645
Insurance Solutions \| Level 1
Origination Year
Total	16,136	18,043
Insurance Solutions \| Level 2
Origination Year
Total	148,127	107,259
Insurance Solutions \| Level 3
Origination Year
Total	8,371	8,120
Insurance Solutions \| Level 4
Origination Year
Total	0	0
Insurance Solutions \| Level 5
Origination Year
Total	26,163	57,223
Insurance Solutions \| Corporate loans
Origination Year
Year one	199	223
Year two	43	48
Year three	533	596
Year four	66	74
Year five	15,295	17,102
Prior	0	0
Total	16,136	18,043
Insurance Solutions \| Corporate loans \| Level 1
Origination Year
Year one	199	223
Year two	43	48
Year three	533	596
Year four	66	74
Year five	15,295	17,102
Prior	0	0
Total	16,136	18,043
Insurance Solutions \| Corporate loans \| Level 2
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Insurance Solutions \| Corporate loans \| Level 3
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Insurance Solutions \| Corporate loans \| Level 4
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Insurance Solutions \| Corporate loans \| Level 5
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Insurance Solutions \| Commercial real estate mortgage loans
Origination Year
Year one	0	7,354
Year two	7,354	5,220
Year three	9,760	17,554
Year four	17,532	12,754
Year five	23,758	18,741
Prior	12,021	3,447
Total	70,425	65,070
Insurance Solutions \| Commercial real estate mortgage loans \| Level 1
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Insurance Solutions \| Commercial real estate mortgage loans \| Level 2
Origination Year
Year one	0	7,354
Year two	7,354	5,220
Year three	9,760	17,554
Year four	17,532	10,840
Year five	21,844	3,460
Prior	3,460	0
Total	59,950	44,428
Insurance Solutions \| Commercial real estate mortgage loans \| Level 3
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	4,482
Prior	4,482	0
Total	4,482	4,482
Insurance Solutions \| Commercial real estate mortgage loans \| Level 4
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Insurance Solutions \| Commercial real estate mortgage loans \| Level 5
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	1,914
Year five	1,914	10,799
Prior	4,079	3,447
Total	5,993	16,160
Insurance Solutions \| Multi-family mortgage loans
Origination Year
Year one	28,736	25,224
Year two	31,815	33,614
Year three	27,415	7,631
Year four	4,100	9,487
Year five	0	19,107
Prior	20,170	12,469
Total	112,236	107,532
Insurance Solutions \| Multi-family mortgage loans \| Level 1
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Insurance Solutions \| Multi-family mortgage loans \| Level 2
Origination Year
Year one	28,736	21,586
Year two	27,926	33,614
Year three	27,415	7,631
Year four	4,100	0
Year five	0	0
Prior	0	0
Total	88,177	62,831
Insurance Solutions \| Multi-family mortgage loans \| Level 3
Origination Year
Year one	0	3,638
Year two	3,889	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	3,889	3,638
Insurance Solutions \| Multi-family mortgage loans \| Level 4
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Total	0	0
Insurance Solutions \| Multi-family mortgage loans \| Level 5
Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	9,487
Year five	0	19,107
Prior	20,170	12,469
Total	$ 20,170	$ 41,063

No definition available.

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

- Definition

Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

Name:	us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477011/948-310-45-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A

Reference 6: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-29

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (1)
-Publisher SEC

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (2)
-Publisher SEC

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-K (SK)
-Number 229
-Section 1404
-Paragraph a
-Publisher SEC

Reference 10: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 80
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-80

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-14

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

+ Details

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=logan_AssetManagementSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=logan_InternalCreditAssessmentLevelOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=logan_CorporateLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=logan_InternalCreditAssessmentLevelTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=logan_InternalCreditAssessmentLevelThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=logan_InternalCreditAssessmentLevelFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=logan_InternalCreditAssessmentLevelFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=logan_InsuranceSolutionsSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=logan_MultiFamilyMortgageLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: