Regulatory Matters - Net Capital Position, Broker-Dealers (Details) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) item	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Net Capital
Amount required to be segregated in cash and securities for the benefit of customers	$ 70,963		$ 70,963	$ 70,963	$ 57,395	$ 67,737
Hilltop Securities
Net Capital
Net capital	264,154		264,154	264,154
Less: required net capital	6,085		6,085	6,085
Excess net capital	$ 258,069		$ 258,069	$ 258,069
Net capital as a percentage of aggregate debit items	86.80%		86.80%	86.80%
Net capital in excess of 5% aggregate debt items	$ 248,941		$ 248,941	$ 248,941
Momentum Independent Network
Net Capital
Net capital	5,242		5,242	5,242
Less: required net capital	340		340	340
Excess net capital	4,902		4,902	4,902
Hilltop Broker-Dealers
Net Capital
Amount required to be segregated in cash and securities for the benefit of customers	71,000		$ 71,000	$ 71,000	$ 57,400
Prime Lending
Net Capital
Threshold operating loss ratio requited to compliance with minimum net worth and liquidity requirements				20.00%
Threshold capital ratio requited to compliance with minimum net worth and liquidity requirements				6.00%
Number of capital infusions received | item			2
Capital received	$ 10,000	$ 10,000