v3.25.2
Fair Values of Assets and Liabilities - Schedule of Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities $ 4,885,715   $ 4,141,482 $ 4,329,957    
Equity securities with readily determinable fair value 273,722   215,412 112,173    
Loans held-for-investment 136,884     135,834    
MSRs 193,061 $ 196,307 203,788 204,610 $ 201,044 $ 192,456
U.S. Treasury            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 13,018   37,907 102,712    
U.S. government agencies            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 45,824   44,945 45,192    
Municipal            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 180,644   184,593 146,608    
Measured at fair value on a recurring basis:            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Trading account securities 0   4,072 4,134    
Equity securities with readily determinable fair value 273,722   215,412 112,173    
Mortgage loans held-for-sale 299,606   331,261 411,851    
Loans held-for-investment 136,884   158,795 135,834    
MSRs 193,061   203,788 204,610    
Nonqualified deferred compensation assets 17,283   16,653 16,041    
Derivative assets 221,106   200,027 243,860    
Total 6,027,377   5,271,490 5,458,460    
Derivative liabilities 161,402   241,750 317,659    
Measured at fair value on a recurring basis: | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Trading account securities 0   0 0    
Equity securities with readily determinable fair value 265,656   207,346 104,107    
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 278,674   245,253 206,819    
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]            
Trading account securities 0   4,072 4,134    
Equity securities with readily determinable fair value 8,066   8,066 8,066    
Mortgage loans held-for-sale 272,438   270,862 371,306    
Loans held-for-investment 83,847   123,899 90,113    
MSRs 0   0 0    
Nonqualified deferred compensation assets 17,283   16,653 16,041    
Derivative assets 215,558   198,077 239,065    
Total 5,353,814   4,603,597 4,860,178    
Derivative liabilities 161,402   241,750 317,659    
Measured at fair value on a recurring basis: | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Trading account securities 0   0 0    
Equity securities with readily determinable fair value 0   0 0    
Mortgage loans held-for-sale 27,168   60,399 40,545    
Loans held-for-investment 53,037   34,896 45,721    
MSRs 193,061   203,788 204,610    
Nonqualified deferred compensation assets 0   0 0    
Derivative assets 5,548   1,950 4,795    
Total 394,889   422,640 391,463    
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 13,018   37,907 102,712    
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 13,018   37,907 102,712    
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 45,824   44,945 45,192    
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 45,824   44,945 45,192    
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 180,644   184,593 146,608    
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 64,569   62,986 50,816    
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 116,075   121,607 95,792    
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 79,799   81,162 77,975    
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 79,799   81,162 77,975    
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 4,566,430   3,792,875 3,957,470    
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 4,566,430   3,792,875 3,957,470    
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