v3.26.3
FAIR VALUE MEASUREMENTS - Schedule of Fair Value of Derivative Instruments and Loans Held for Sale (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Derivative notional amount and balance sheet location    
Estimated Gain on Sale $ 26,721 $ 31,191
Total Fair Value Adjustment 26,721 31,191
Derivative Assets $ 53,545 $ 27,216
Derivative Asset, Statement of Financial Position Other assets Other assets
Derivative Liabilities $ (34,805) $ (1,718)
Derivative Liability, Statement of Financial Position Other liabilities Other liabilities
Fair Value Adjustment $ 7,981 $ 5,693
Undesignated derivatives    
Derivative notional amount and balance sheet location    
Estimated Gain on Sale 26,721 31,191
Total Fair Value Adjustment 26,721 31,191
Derivative Assets 53,545 26,289
Derivative Liabilities (12,320) (1,718)
Fair Value Adjustment (14,504) 6,620
Designated derivatives    
Derivative notional amount and balance sheet location    
Derivative Assets   927
Derivative Liabilities (22,485)  
Fair Value Adjustment 22,485 (927)
Interest Rate Swaps | Designated derivatives    
Derivative notional amount and balance sheet location    
Notional Amount 400,000 400,000
Interest Rate Movement (22,485) 927
Total Fair Value Adjustment (22,485) 927
Derivative Assets   927
Derivative Liabilities (22,485)  
Rate lock commitments | Undesignated derivatives    
Derivative notional amount and balance sheet location    
Notional Amount 484,887 374,384
Estimated Gain on Sale 21,129 18,673
Interest Rate Movement (18,582) (1,546)
Total Fair Value Adjustment 2,547 17,127
Derivative Assets 14,867 17,608
Derivative Liabilities (12,320) (481)
Forward sale contracts | Undesignated derivatives    
Derivative notional amount and balance sheet location    
Notional Amount 1,193,518 1,804,114
Interest Rate Movement 38,678 7,444
Total Fair Value Adjustment 38,678 7,444
Derivative Assets 38,678 8,681
Derivative Liabilities   (1,237)
Loans held for sale, at fair value | Undesignated derivatives    
Derivative notional amount and balance sheet location    
Notional Amount 708,631 1,429,730
Estimated Gain on Sale 5,592 12,518
Interest Rate Movement (20,096) (5,898)
Total Fair Value Adjustment (14,504) 6,620
Fair Value Adjustment (14,504) 6,620
Senior Notes | Designated derivatives    
Derivative notional amount and balance sheet location    
Notional Amount 400,000 400,000
Interest Rate Movement 22,485 (927)
Total Fair Value Adjustment 22,485 (927)
Fair Value Adjustment $ 22,485 $ (927)