v3.26.1
Note 5 - Loans - Aging of Loan Portfolio (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Loans held for investment $ 20,621,332 $ 20,147,202
Recorded investment 111,696 112,363
Financial Asset, 30 to 59 Days Past Due [Member]    
Loans held for investment 2,589 50,063
Financial Asset, 60 to 89 Days Past Due [Member]    
Loans held for investment 65,725 18,491
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Loans held for investment 0 1,000
Financial Asset, Past Due [Member]    
Loans held for investment 180,010 181,917
Recorded investment 111,696 112,363
Financial Asset, Not Past Due [Member]    
Loans held for investment 20,441,322 19,965,285
Commercial Portfolio Segment [Member]    
Loans held for investment 3,524,945 3,184,556
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]    
Loans held for investment 1,372 13,561
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]    
Loans held for investment 27,966 1,376
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Loans held for investment 0 0
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]    
Loans held for investment 37,786 36,435
Recorded investment 8,448 21,498
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]    
Loans held for investment 3,487,159 3,148,121
Real Estate Construction Portfolio Segment [Member]    
Loans held for investment 248,375 337,550
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]    
Loans held for investment 0 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]    
Loans held for investment 0 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Loans held for investment 0 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Past Due [Member]    
Loans held for investment 0 0
Recorded investment 0 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]    
Loans held for investment 248,375 337,550
Commercial Real Estate Portfolio Segment [Member]    
Loans held for investment 10,779,326 10,564,744
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]    
Loans held for investment 326 5,062
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]    
Loans held for investment 29,265 6,254
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Loans held for investment 0 1,000
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member]    
Loans held for investment 99,748 71,827
Recorded investment 70,157 59,511
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]    
Loans held for investment 10,679,578 10,492,917
Residential Mortgage and Equity Lines Portfolio Segment [Member]    
Loans held for investment 6,066,424 6,058,538
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]    
Loans held for investment 891 31,440
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]    
Loans held for investment 8,494 10,861
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Loans held for investment 0 0
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Past Due [Member]    
Loans held for investment 42,476 73,655
Recorded investment 33,091 31,354
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]    
Loans held for investment 6,023,948 5,984,883
Installment and Other Loans [Member ]    
Loans held for investment 2,262 1,814
Installment and Other Loans [Member ] | Financial Asset, 30 to 59 Days Past Due [Member]    
Loans held for investment 0 0
Installment and Other Loans [Member ] | Financial Asset, 60 to 89 Days Past Due [Member]    
Loans held for investment 0 0
Installment and Other Loans [Member ] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Loans held for investment 0 0
Installment and Other Loans [Member ] | Financial Asset, Past Due [Member]    
Loans held for investment 0 0
Recorded investment 0 0
Installment and Other Loans [Member ] | Financial Asset, Not Past Due [Member]    
Loans held for investment $ 2,262 $ 1,814