v3.26.3
Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
PrimeLending and Hilltop Broker-Dealers          
Derivative financial instruments          
Cash collateral advanced to offset net derivative liability $ 6,600   $ 6,600   $ 6,500
Not Designated as Hedging Instrument | Prime Lending          
Derivative financial instruments          
Increase (decrease) in fair value of derivatives during period 4,836 $ 6,180 8,987 $ 570  
Not Designated as Hedging Instrument | Hilltop Broker-Dealers          
Derivative financial instruments          
Increase (decrease) in fair value of derivatives during period (6,460) 2,312 (13,010) 1,658  
Not Designated as Hedging Instrument | Bank          
Derivative financial instruments          
Increase (decrease) in fair value of derivatives during period 19 $ 9 77 $ (24)  
Designated as Hedging Instrument | Bank and PrimeLending          
Derivative financial instruments          
Cash collateral advanced to offset net derivative assets 51,900   51,900   25,000
IRLCs | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 503,080   503,080   456,734
Estimated Fair Value (225)   (225)   5,997
Commitments to Purchase MBSs | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 1,504,911   1,504,911   1,586,198
Estimated Fair Value (19,501)   (19,501)   7,311
Commitments to Sell MBSs | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 1,741,917   1,741,917   2,383,043
Estimated Fair Value 17,924   17,924   (6,344)
Commitments to Sell MBSs | Not Designated as Hedging Instrument | Prime Lending          
Derivative financial instruments          
Cash collateral advanced to offset net derivative liability         4,100
Interest Rate Swaps | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 53,500   53,500   53,470
Estimated Fair Value 5,214   5,214   (666)
Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 145,000   145,000   137,000
Estimated Fair Value 3,873   3,873   1,291
Carrying value of available for sale securities and loans held for investment 249,500   249,500   323,400
Interest Rate Swaps | Fair Value Hedging | Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 294,846   294,846   317,335
Estimated Fair Value 35,106   35,106   23,858
Designated hedge amount from closed portfolio of available for sale securities and loans held for investment 284,800   284,800   347,300
Cumulative adjustment in available for sale securities and loans held for investment 35,200   35,200   24,000
Interest rate swaps back-to-back (asset) | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 88,768   88,768   110,437
Estimated Fair Value 1,528   1,528   1,495
Interest rate swaps back-to-back (liability) | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 88,768   88,768   110,437
Estimated Fair Value (1,522)   (1,522)   (1,551)
U.S. Treasury bond futures and options | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 161,600   161,600   217,220
Interest rate and other futures | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 258,400   258,400   9,250
Credit default swaps | Not Designated as Hedging Instrument          
Derivative financial instruments          
Notional Amount 55,000   55,000   40,000
Estimated Fair Value $ 87   $ 87   $ 7