v3.26.1
Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
PrimeLending and Hilltop Broker-Dealers          
Derivative financial instruments          
Cash collateral advanced to offset net derivative liability $ 6,500   $ 6,500   $ 6,500
Not Designated as Hedging Instrument | Prime Lending          
Derivative financial instruments          
Increase (decrease) in fair value of derivatives during period (5,142) $ (6,598) 4,150 $ (5,610)  
Not Designated as Hedging Instrument | Hilltop Broker-Dealers          
Derivative financial instruments          
Increase (decrease) in fair value of derivatives during period 1,400 (4,905) (6,550) (655)  
Not Designated as Hedging Instrument | Bank          
Derivative financial instruments          
Increase (decrease) in fair value of derivatives during period 35 $ (10) 58 $ (33)  
Designated as Hedging Instrument | Bank and PrimeLending          
Derivative financial instruments          
Cash collateral advanced to offset net derivative assets 27,100   27,100   25,000
IRLCs | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 672,920   672,920   456,734
Estimated Fair Value 8,790   8,790   5,997
Commitments to Purchase MBSs | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 1,689,278   1,689,278   1,586,198
Estimated Fair Value 4,112   4,112   7,311
Commitments to Sell MBSs | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 2,422,495   2,422,495   2,383,043
Estimated Fair Value (5,592)   (5,592)   (6,344)
Commitments to Sell MBSs | Not Designated as Hedging Instrument | Prime Lending          
Derivative financial instruments          
Cash collateral advanced to offset net derivative liability 2,900   2,900   4,100
Interest Rate Swaps | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 38,000   38,000   53,470
Estimated Fair Value (1,548)   (1,548)   (666)
Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 130,000   130,000   137,000
Estimated Fair Value 1,691   1,691   1,291
Carrying value of available for sale securities and loans held for investment 280,100   280,100   323,400
Interest Rate Swaps | Fair Value Hedging | Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 317,009   317,009   317,335
Estimated Fair Value 26,762   26,762   23,858
Designated hedge amount from closed portfolio of available for sale securities and loans held for investment 307,000   307,000   347,300
Cumulative adjustment in available for sale securities and loans held for investment 26,900   26,900   24,000
Interest rate swaps back-to-back (asset) | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 105,768   105,768   110,437
Estimated Fair Value 522   522   1,495
Interest rate swaps back-to-back (liability) | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 105,768   105,768   110,437
Estimated Fair Value (535)   (535)   (1,551)
U.S. Treasury bond futures and options | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 144,300   144,300   217,220
Interest rate and other futures | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 347,400   347,400   9,250
Credit default swaps | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount $ 45,000   $ 45,000   40,000
Estimated Fair Value         $ 7