Regulatory Capital Requirements - Schedule of Regulatory Capital Requirements (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
TWL
Regulatory Capital Requirements
Regulatory Capital	$ 66,250	$ 65,479
Excess Regulatory Capital	61,727	60,183
Regulatory Capital Requirement	4,523	5,296
DW
Regulatory Capital Requirements
Regulatory Capital	260,152	260,326
Excess Regulatory Capital	258,434	257,195
Regulatory Capital Requirement	1,718	3,131
TWD
Regulatory Capital Requirements
Regulatory Capital	53,481	54,479
Excess Regulatory Capital	52,459	53,021
Regulatory Capital Requirement	1,022	1,458
TEL
Regulatory Capital Requirements
Regulatory Capital	133,039	94,572
Excess Regulatory Capital	100,520	61,388
Regulatory Capital Requirement	32,519	33,184
TWEU
Regulatory Capital Requirements
Regulatory Capital	8,057	8,253
Excess Regulatory Capital	752	770
Regulatory Capital Requirement	7,305	7,483
TWJ
Regulatory Capital Requirements
Regulatory Capital	11,310	10,619
Excess Regulatory Capital	8,327	7,914
Regulatory Capital Requirement	2,983	2,705
TESBV
Regulatory Capital Requirements
Regulatory Capital	8,323	8,527
Excess Regulatory Capital	4,327	4,499
Regulatory Capital Requirement	3,996	4,028
TESL
Regulatory Capital Requirements
Regulatory Capital	6,751	6,889
Excess Regulatory Capital	5,759	5,712
Regulatory Capital Requirement	992	1,177
YB
Regulatory Capital Requirements
Regulatory Capital	7,472	9,932
Excess Regulatory Capital	7,472	9,932
Regulatory Capital Requirement	0	0
TDIFC
Regulatory Capital Requirements
Regulatory Capital	283	283
Excess Regulatory Capital	253	253
Regulatory Capital Requirement	30	30
ICDLT
Regulatory Capital Requirements
Regulatory Capital	7,832	7,992
Excess Regulatory Capital	3,902	3,866
Regulatory Capital Requirement	3,930	4,126
ICDLC
Regulatory Capital Requirements
Regulatory Capital	11,564	10,349
Excess Regulatory Capital	10,816	9,583
Regulatory Capital Requirement	748	766
TWSA
Regulatory Capital Requirements
Regulatory Capital	538	735
Excess Regulatory Capital	475	672
Regulatory Capital Requirement	63	63
TAPL
Regulatory Capital Requirements
Regulatory Capital	127	148
Excess Regulatory Capital	88	109
Regulatory Capital Requirement	39	39
TW SEF
Regulatory Capital Requirements
Financial Resources	110,121	68,063
Required Financial Resources	18,500	18,000
Excess Financial Resources	91,621	50,063
Liquid Financial Assets	37,082	34,190
Required Liquid Financial Assets	4,625	4,500
Excess Liquid Financial Assets	32,457	29,690
DW SEF
Regulatory Capital Requirements
Financial Resources	15,216	15,027
Required Financial Resources	8,551	8,511
Excess Financial Resources	6,665	6,516
Liquid Financial Assets	9,949	10,664
Required Liquid Financial Assets	2,138	2,128
Excess Liquid Financial Assets	$ 7,811	$ 8,536

Amount of net capital of futures commission merchant (FCM) in excess of required net capital per Commodity Futures Trading Commission's (CFTC) requirement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name CFTC Regulation
-Number 1
-Section 17
-Paragraph a
-Subparagraph (1)(i)
-Publisher CFTC

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Amount of adjusted net capital of futures commission merchant (FCM) per Commodity Futures Trading Commission's (CFTC) requirement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name CFTC Regulation
-Number 1
-Section 17
-Paragraph c
-Subparagraph (5)
-Publisher CFTC

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Amount of net capital required to be maintained by futures commission merchant (FCM) per Commodity Futures Trading Commission's (CFTC) requirement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name CFTC Regulation
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-Publisher CFTC

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- Definition

The amount by which actual liquid financial assets exceeds (does not exceed) required liquid financial assets under the Commodity Exchange Act

+ References

No definition available.

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- Definition

Amount by which the entity's regulatory capital (as defined) exceeds the requirement.

+ References

No definition available.

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- Definition

Liquid financial assets calculated under the Commodity Exchange Act.

+ References

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- Definition

Regulatory capital as calculated for each entity under applicable regulations.

+ References

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- Definition

Amount of regulatory capital required to be maintained for each entity under applicable regulations.

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- Definition

Amount of liquid financial assets required to be maintained under the Commodity Exchange Act.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

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