v3.26.1
Fair Value of Assets and Liabilities - Schedule of Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities $ 7,244,282 $ 6,236,263 $ 4,220,305  
Equity securities with readily determinable fair value 63,786 63,770 270,442  
Loans held-for-investment 150,470   126,521  
MSRs 195,276 195,023 196,307 $ 203,788
U.S. Treasury        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 5,014 7,035 12,994  
U.S. government agencies        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 46,969 47,471 45,944  
Municipal        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 174,259 162,166 188,149  
Measured at fair value on a recurring basis:        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Equity securities with readily determinable fair value 63,786 63,770 270,442  
Mortgage loans held-for-sale 383,405 340,745 316,804  
Loans held-for-investment 150,470 151,590 126,521  
MSRs 195,276 195,023 196,307  
Nonqualified deferred compensation assets 17,630 18,112 16,396  
Derivative assets 152,851 179,667 204,257  
Total 8,207,700 7,185,170 5,351,032  
Derivative liabilities 118,937 123,774 181,198  
Measured at fair value on a recurring basis: | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Equity securities with readily determinable fair value 55,720 55,704 262,376  
Mortgage loans held-for-sale 0 0 0  
Loans held-for-investment 0 0 0  
MSRs 0 0 0  
Nonqualified deferred compensation assets 0 0 0  
Derivative assets 0 0 0  
Total 60,734 62,739 275,370  
Derivative liabilities 0 0 0  
Measured at fair value on a recurring basis: | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Equity securities with readily determinable fair value 8,066 8,066 8,066  
Mortgage loans held-for-sale 330,932 286,931 260,480  
Loans held-for-investment 95,113 95,390 92,519  
MSRs 0 0 0  
Nonqualified deferred compensation assets 17,630 18,112 16,396  
Derivative assets 148,326 176,251 198,764  
Total 7,725,150 6,714,375 4,661,692  
Derivative liabilities 118,937 123,774 181,198  
Measured at fair value on a recurring basis: | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Equity securities with readily determinable fair value 0 0 0  
Mortgage loans held-for-sale 52,473 53,814 56,324  
Loans held-for-investment 55,357 56,200 34,002  
MSRs 195,276 195,023 196,307  
Nonqualified deferred compensation assets 0 0 0  
Derivative assets 4,525 3,416 5,493  
Total 421,816 408,056 413,970  
Derivative liabilities 0 0 0  
Measured at fair value on a recurring basis: | U.S. Treasury        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 5,014 7,035 12,994  
Measured at fair value on a recurring basis: | U.S. Treasury | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 5,014 7,035 12,994  
Measured at fair value on a recurring basis: | U.S. Treasury | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 0 0 0  
Measured at fair value on a recurring basis: | U.S. Treasury | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 0 0 0  
Measured at fair value on a recurring basis: | U.S. government agencies        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 46,969 47,471 45,944  
Measured at fair value on a recurring basis: | U.S. government agencies | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 0 0 0  
Measured at fair value on a recurring basis: | U.S. government agencies | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 46,969 47,471 45,944  
Measured at fair value on a recurring basis: | U.S. government agencies | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 0 0 0  
Measured at fair value on a recurring basis: | Municipal        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 174,259 162,166 188,149  
Measured at fair value on a recurring basis: | Municipal | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 0 0 0  
Measured at fair value on a recurring basis: | Municipal | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 60,074 62,563 66,305  
Measured at fair value on a recurring basis: | Municipal | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 114,185 99,603 121,844  
Measured at fair value on a recurring basis: | Corporate notes        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 77,597 77,295 81,435  
Measured at fair value on a recurring basis: | Corporate notes | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 0 0 0  
Measured at fair value on a recurring basis: | Corporate notes | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 77,597 77,295 81,435  
Measured at fair value on a recurring basis: | Corporate notes | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 0 0 0  
Measured at fair value on a recurring basis: | Mortgage-backed        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 6,940,443 5,942,296 3,891,783  
Measured at fair value on a recurring basis: | Mortgage-backed | Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 0 0 0  
Measured at fair value on a recurring basis: | Mortgage-backed | Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities 6,940,443 5,942,296 3,891,783  
Measured at fair value on a recurring basis: | Mortgage-backed | Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities $ 0 $ 0 $ 0