v3.26.1
Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income [Line Items]        
Tax expense (benefit) $ 54,000 $ 185,000 $ 123,000 $ 568,000
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period 49,234,000 49,511,000 49,425,000 48,375,000
Other net changes 182,000 1,030,000 408,000 2,257,000
Balance at end of period 50,147,000 49,451,000 50,147,000 49,451,000
Accumulated Other Comprehensive Income (Loss)        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance at beginning of period (10,757,000) (13,621,000) (10,983,000) (14,848,000)
Other net changes 182,000 1,030,000 408,000 2,257,000
Balance at end of period (10,575,000) (12,591,000) (10,575,000) (12,591,000)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent        
Accumulated Other Comprehensive Income [Line Items]        
Net unrealized gain (loss), tax expense (benefit) (4,000) 116,000 (2,000) 369,000
Other reclassifications included in other revenue, tax expense (benefit) 6,000 8,000 6,000 10,000
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Net unrealized gain (loss), net of tax expense (benefit) (6,000) 501,000 0 1,309,000
Other reclassifications included in other revenue, net of tax expense (benefit) 19,000 22,000 19,000 30,000
Amortization of Held to Maturity Securities Transferred from Available for Sale Attributable to Parent        
Accumulated Other Comprehensive Income [Line Items]        
Tax expense (benefit) 121,000 61,000 238,000 189,000
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Other net changes 393,000 500,000 772,000 910,000
AOCI, Cash Flow Hedge, Parent        
Accumulated Other Comprehensive Income [Line Items]        
Tax expense (benefit) (74,000) (4,000) (128,000) (4,000)
Reclassifications, tax expense (benefit) 5,000 4,000 9,000 4,000
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Net unrealized gain (loss), net of tax expense (benefit) (241,000) (11,000) (412,000) (11,000)
Other reclassifications included in other revenue, net of tax expense (benefit) $ 17,000 13,000 31,000 13,000
Other Accumulated Other Comprehensive Income        
Accumulated Other Comprehensive Income [Line Items]        
Tax expense (benefit)   500 500 500
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Other net changes   $ 5,000 $ (2,000) $ 6,000