v3.26.1
Loans Receivable - Composition of Impaired Loans by Portfolio Segment and Class of Financing Receivable (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   $ 107,283,000 $ 61,401,000
Nonaccrual loans with an allowance $ 62,187,000 62,187,000 63,531,000
Nonaccrual loans with no allowance 29,164,000 29,164,000 43,752,000
Nonaccrual loans at ending balance 91,351,000 91,351,000 107,283,000
Interest income, accrual method 0 0 0
Amortized cost basis of collateral-dependent loans 39,210,000 39,210,000 57,734,000
Real estate      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 30,516,000 30,516,000 45,907,000
Equipment      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 7,052,000 7,052,000 9,475,000
Other      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 1,642,000 1,642,000 2,352,000
Personal Banking      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   21,713,000 15,311,000
Nonaccrual loans with an allowance 17,178,000 17,178,000 16,956,000
Nonaccrual loans with no allowance 4,749,000 4,749,000 4,757,000
Nonaccrual loans at ending balance 21,927,000 21,927,000 21,713,000
Personal Banking | Residential mortgage loans      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   12,247,000 6,951,000
Nonaccrual loans with an allowance 8,891,000 8,891,000 9,158,000
Nonaccrual loans with no allowance 2,875,000 2,875,000 3,089,000
Nonaccrual loans at ending balance 11,766,000 11,766,000 12,247,000
Personal Banking | Home equity loans      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   3,755,000 3,332,000
Nonaccrual loans with an allowance 4,599,000 4,599,000 3,017,000
Nonaccrual loans with no allowance 771,000 771,000 738,000
Nonaccrual loans at ending balance 5,370,000 5,370,000 3,755,000
Personal Banking | Vehicle loans      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   5,493,000 4,829,000
Nonaccrual loans with an allowance 3,684,000 3,684,000 4,563,000
Nonaccrual loans with no allowance 965,000 965,000 930,000
Nonaccrual loans at ending balance 4,649,000 4,649,000 5,493,000
Personal Banking | Consumer loans      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   218,000 199,000
Nonaccrual loans with an allowance 4,000 4,000 218,000
Nonaccrual loans with no allowance 138,000 138,000 0
Nonaccrual loans at ending balance 142,000 142,000 218,000
Commercial Banking      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   85,570,000 46,090,000
Nonaccrual loans with an allowance 45,009,000 45,009,000 46,575,000
Nonaccrual loans with no allowance 24,415,000 24,415,000 38,995,000
Nonaccrual loans at ending balance 69,424,000 69,424,000 85,570,000
Amortized cost basis of collateral-dependent loans 39,210,000 39,210,000 57,734,000
Commercial Banking | Real estate      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 30,516,000 30,516,000 45,907,000
Commercial Banking | Equipment      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 7,052,000 7,052,000 9,475,000
Commercial Banking | Other      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 1,642,000 1,642,000 2,352,000
Commercial Banking | Commercial real estate loans      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   56,223,000 36,183,000
Nonaccrual loans with an allowance 26,370,000 26,370,000 24,186,000
Nonaccrual loans with no allowance 19,550,000 19,550,000 32,037,000
Nonaccrual loans at ending balance 45,920,000 45,920,000 56,223,000
Amortized cost basis of collateral-dependent loans 28,252,000 28,252,000 40,136,000
Commercial Banking | Commercial real estate loans | Real estate      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 28,252,000 28,252,000 40,086,000
Commercial Banking | Commercial real estate loans | Equipment      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 0 0 50,000
Commercial Banking | Commercial real estate loans | Other      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 0 0 0
Commercial Banking | Commercial real estate loans - owner occupied      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   1,262,000 784,000
Nonaccrual loans with an allowance 539,000 539,000 275,000
Nonaccrual loans with no allowance 981,000 981,000 987,000
Nonaccrual loans at ending balance 1,520,000 1,520,000 1,262,000
Commercial Banking | Commercial and industrial loans      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Nonaccrual loans at beginning balance   28,085,000 9,123,000
Nonaccrual loans with an allowance 18,100,000 18,100,000 22,114,000
Nonaccrual loans with no allowance 3,884,000 3,884,000 5,971,000
Nonaccrual loans at ending balance 21,984,000 21,984,000 28,085,000
Amortized cost basis of collateral-dependent loans 10,958,000 10,958,000 17,598,000
Commercial Banking | Commercial and industrial loans | Real estate      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 2,264,000 2,264,000 5,821,000
Commercial Banking | Commercial and industrial loans | Equipment      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans 7,052,000 7,052,000 9,425,000
Commercial Banking | Commercial and industrial loans | Other      
Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward]      
Amortized cost basis of collateral-dependent loans $ 1,642,000 $ 1,642,000 $ 2,352,000